A new study shows that rising levels of planet-warming gases may reduce important nutrients in food crops.
Researchers studied the effects of one such gas—carbon dioxide—on rice. The researchers grew rice plants in a controlled environment. They set carbon dioxide levels to what scientists are predicting for our planet by the end of the century. They found that the resulting rice crops had lower than normal levels of vitamins, minerals and protein. The researchers said the effects of planet-warming gases would be most severe for the poorest citizens in some of the least developed countries. These people generally eat the most rice and have the least complex diets, they noted.
In the experiment, scientists grew 18 kinds of rice in fields in China and Japan. They pumped carbon dioxide gas over the plants in an effort to create the atmosphere of the future. Rice grown under high carbon dioxide conditions had, on average, 13 to 30 percent lower levels of four B vitamins and 10 percent less protein. The crops also had 8 percent less iron and 5 percent less zinc（锌）an rice grown under normal conditions. However, vitamin E levels increased by about 13 percent on average.
The results are bad news, “especially for the nutrition of the poorer population in less-developed countries,” said the University of Tokyo’s Kazuhiko Kobayashi, who helped to write the report. That includes about 600 million people in Indonesia, Cambodia, Myanmar, Bangladesh, Laos and other nations, mainly in Southeast Asia, the report said.
One of the scientists is Sam Myers of Harvard University in the American state of Massachusetts. He said that findings like this are an example of the surprises climate change create. “My concern is there are many more surprises to come,” he said.
Myers noted that pollution, loss of some species, destruction of forests, and other human activities are likely to produce unexpected problems. He said that you cannot completely change all the natural systems that living organisms have grown to depend on over millions of years without having effects come back to affect our own health.
The new study suggests a way to lower the nutritional harm of climate change. One way, Kobayashi said, is grow different forms of rice that have shown to be more resistant to higher carbon dioxide levels.
1.Which county would be influenced most by planet-warming gases according to the text?
A. China B. Britain C. America D. Myanmar
2.How is Paragraph 3 mainly developed?
A. By comparison. B. By giving examples.
C. By analyzing causes. D. By describing a process.
3.What does the underlined sentence in Paragraph 5 mean?
A. Climate change will be difficult to predict.
B. Climate change will lead to more good effects.
C. Climate change will be harmful to environment.
D. Climate change will cause more unexpected problems.
4.Which of the following statements is true according to the text?
A. Myers said we could change all the natural systems for the sake of our health.
B. The poorest people in all the least developed countries would be influenced most.
C. The researchers grew 18 kinds of rice in China and Japan in a controlled environment.
D. Protein in rice grown under high carbon dioxide conditions is increased by 10 percent.
高二英语阅读理解困难题
A new study shows that rising levels of planet-warming gases may reduce important nutrients in food crops.
Researchers studied the effects of one such gas—carbon dioxide—on rice. The researchers grew rice plants in a controlled environment. They set carbon dioxide levels to what scientists are predicting for our planet by the end of the century. They found that the resulting rice crops had lower than normal levels of vitamins, minerals and protein. The researchers said the effects of planet-warming gases would be most severe for the poorest citizens in some of the least developed countries. These people generally eat the most rice and have the least complex diets, they noted.
In the experiment, scientists grew 18 kinds of rice in fields in China and Japan. They pumped carbon dioxide gas over the plants in an effort to create the atmosphere of the future. Rice grown under high carbon dioxide conditions had, on average, 13 to 30 percent lower levels of four B vitamins and 10 percent less protein. The crops also had 8 percent less iron and 5 percent less zinc（锌）an rice grown under normal conditions. However, vitamin E levels increased by about 13 percent on average.
The results are bad news, “especially for the nutrition of the poorer population in less-developed countries,” said the University of Tokyo’s Kazuhiko Kobayashi, who helped to write the report. That includes about 600 million people in Indonesia, Cambodia, Myanmar, Bangladesh, Laos and other nations, mainly in Southeast Asia, the report said.
One of the scientists is Sam Myers of Harvard University in the American state of Massachusetts. He said that findings like this are an example of the surprises climate change create. “My concern is there are many more surprises to come,” he said.
Myers noted that pollution, loss of some species, destruction of forests, and other human activities are likely to produce unexpected problems. He said that you cannot completely change all the natural systems that living organisms have grown to depend on over millions of years without having effects come back to affect our own health.
The new study suggests a way to lower the nutritional harm of climate change. One way, Kobayashi said, is grow different forms of rice that have shown to be more resistant to higher carbon dioxide levels.
1.Which county would be influenced most by planet-warming gases according to the text?
A. China B. Britain C. America D. Myanmar
2.How is Paragraph 3 mainly developed?
A. By comparison. B. By giving examples.
C. By analyzing causes. D. By describing a process.
3.What does the underlined sentence in Paragraph 5 mean?
A. Climate change will be difficult to predict.
B. Climate change will lead to more good effects.
C. Climate change will be harmful to environment.
D. Climate change will cause more unexpected problems.
4.Which of the following statements is true according to the text?
A. Myers said we could change all the natural systems for the sake of our health.
B. The poorest people in all the least developed countries would be influenced most.
C. The researchers grew 18 kinds of rice in China and Japan in a controlled environment.
D. Protein in rice grown under high carbon dioxide conditions is increased by 10 percent.
高二英语阅读理解困难题查看答案及解析
Sharks use their good sense of smell to search for prey（猎物）. But a new study shows that the rising levels of carbon dioxide in the ocean could reduce sharks' ability to find food. It's bad news for a healthy ocean. Sharks are top predators（掠食动物）and are like the ocean's weed controllers.
Dixson works at the Woods Hole Oceanographic Institution in Massachusetts. Her earlier work has shown that clown fish in acidifying（酸化的）water act strangely. "We want to expand this research to sharks .because we know how important it is for sharks to find their food through their sense of smell," said Dixson.
Her team started by placing sharks in each of three different pools for five days. Each pool had a different level of carbon dioxide in it. The first had the same amount as today's ocean water. The second had a level of carbon dioxide that scientists expect to reach by 2050. The third pool had the highest level of carbon dioxide that could develop by the year 2100.
Sharks weren't allowed to eat any food while in the pools. This made sure that they would be hungry. Then, Dixson released the sharks one at a time into a pool with two side-by-side streams of flowing water. In one stream, the researchers pumped water, in which a dead squid had been overnight. This water smelled strongly of the squid. The other stream contained ocean water with no scent（气味）. Because each stream flowed at the same rate and in the same direction, the squid smell stayed in its stream. The sharks could choose to swim in either stream.
Sharks that had been swimming for five days in pools of regular ocean water spent more than 60 percent of their time in the squid-scented stream. The same was true for sharks that had been in water with the carbon dioxide level that could develop by the year 2050. But sharks exposed to the highest level of carbon dioxide spent just 15 percent of their time in the squid-scented stream.
1.Why did the writer mention the sharks smell at the beginning of the passage?
A. Because the writer appreciates their ability to find food.
B. Because the writer considers them dangerous to human beings.
C. Because the writer intends to show how to control weed in the ocean.
D. Because the writer worries about the sharks in the ocean.
2.What is Paragraph 3 mainly about?
A. What the ocean in the future will be like.
B. Who helped Dixson conduct the study.
C. What kinds of pools were used during the study.
D. What the levels of carbon dioxide will be at in the ocean in the future.
3.The researchers pumped water where a dead squid had been overnight to ______.
A. help the sharks look for food
B. test the sharks' sense of smell
C. prove that sharks like eating squids
D. explain why carbon dioxide in the ocean affects sharks
4.What does the underlined sentence in the last paragraph suggest?
A. Sharks like the squid-scented stream better.
B. Sharks like the stream with the high level of carbon dioxide.
C. Sharks spent 15% of their time in the squid-scented stream.
D. The high level of carbon dioxide can affect the sharks ability to smell.
高二英语阅读理解中等难度题查看答案及解析
Industrial emissions (排放) of carbon dioxide and other planet-warming greenhouse gases have raised the global average temperature by about 0.8°C since the beginning of the Industrial Revolution. But studies have disagreed about what impact the rise is having on the world’s species, says Mark Urban, an ecologist at the University of Connecticut, Storrs. Some have estimated that as many as 54% of species could eventually become extinct as a result of the climate change, but others have suggested no significant impact.①
Such disparate result might originate from the limited nature of some individual studies, possibly because they focused only on a few species or a relatively small geographical region, says Urban.② To address these limits, Urban used statistical methods to help blend the results of previous studies into an apples-to-apples comparison that estimates the risk of extinction of species worldwide.
③He chose to analyze only the results of studies that had assessed extinction risks of more than one species. Then he researched into the details, such as the regions in which species considered, whether those species were limited to one small region or were widely spread, and whether the species were free to move as climate changed or were blocked by barriers such as mountain ranges or urban development.④
Effects of climate change aren’t always immediate, Urban says, and the risks of extinction he’s estimated are the long-term results of species not being able to find a suitable habitat. Maybe the habitat will merely shrink to a size that can’t support the species, or maybe it will disappear entirely. In some cases, he notes, a species might not be able to outpace the shift in its range, dying out before it can reach a new homeland. For over the generations that rapid warming might kill them off before they can spread to a suitable new habitat.
1.What is the passage aimed to tell us?
A. It is the Industrial Revolution that raised the global average temperature.
B. Mark Urban is an ecologist at the University of Connecticut, Storrs.
C. The climate change contributes to almost all the species dying out.
D. Global warming is not a main factor accounting for species extinction.
2.The sentence “And different teams have often used different methods to come up with their predictions.” can be placed in ________.
A. ① B. ② C. ③ D. ④
3.According to Mark Urban in Paragraph 4, some species died out mainly because of ________.
A. the rising temperatures B. human activities
C. their low birth rates D. the loss of their habitats
高二英语阅读理解困难题查看答案及解析
A new study of 8,000 young people in the Journal of Health and Social Behavior shows that although love can make adults live healthily and happily，it is a bad thing for young people．Puppy love（早恋）may bring stress for young people and can lead to depression（忧郁症）．The study shows that girls become more depressed than boys，and younger girls are the worst of all．
The possible reason for the connection between love and higher risk of depression for girls is “loss of self”．According to the study，even though boys would say “lose themselves in a romantic relationship”，this “loss of self” is much more likely to lead to depression when it happens to girls．Young girls who have romantic relationships usually like hiding their feelings and opinions．They won’t tell that to their parents．
Dr Marianm Kaufman，an expert on young people problems，says 15% to 20% young people will have depression during their growing．Trying romance often causes the depression．She advises kids not to jump into romance too early．During growing up，it is important for young people to build strong friendships and a strong sense of self．She also suggests the parents should encourage their kids to keep close to their friends，attend more interesting school activities and spend enough time with family．
Parents should watch for signs of depression—eating or mood changes—and if they see signs from their daughters or sons，they need to give help．The good news is that the connection between romance and depression seems to become weak with age．Love will always make us feel young，but only maturity（成熟）gives us a chance to avoid its bad side effects．
1.What’s the main idea of the passage?
A．Parents should forbid their children’s love．
B．Puppy love may bring young people depression．
C．Romance is a two-edged sword for adults．
D．Romance is good for young people．
2.Which of the following is more likely to have depression?
A．Young people who have a strong sense of selfishness．
B．Young boys whose parents watch for their behavior．
C．Young girls who always hide their feelings and opinions．
D．Careless parents whose children are deep in love．
3.What can be inferred from the passage?
A．The older a woman is，the less likely she seems to lose herself in romance．
B．Early love makes young people keep close to their friends and parents．
C．Parents should help their children to be aware of the signs of depression．
D．Lacking love can lead young people to grow up more quickly．
高二英语阅读理解中等难度题查看答案及解析
A new study of 8,000 young people in the journal of Health and Social Behavior shows that although love can make adults live healthily and happily，it is a bad thing for young people. Puppy love（早恋）may bring stress for young people and can lead to depression. The study shows that girls become more depressed than boys, and younger girls are the worst of all.
The possible reason for the connection between love and higher risk of depression for girls is “loss of self”. According to the study, even though boys would say “lose themselves in a romantic relationship”, this “loss of self” is much more likely to lead to depression when it happens to girls. Young girls who have romantic relationships usually like hiding their feelings and opinions. They won’t tell that to their parents.
Dr Marianm Kaufman, an expert on young people problems, says 15% to 20% young people will have depression during their growing. Trying romance often causes the depression. She advises kids not to jump into romance too early. During growing up, it is important for young people to build strong friendships and a strong sense of self. She also suggests the parents should encourage their kids to keep close to their friends, attend more interesting school activities and spend enough time with family.
Parents should watch for signs of depression—eating or mood changes—and if they see signs from their daughters or sons，they need to give help. The good news is that the connection between romance and depression seems to become weak with age. Love will always make us feel young, but only maturity(成熟) gives us a chance to avoid its bad side effects.
1.What’s the main idea of the passage?
A. Romance is a two-edged sword for adults.
B. Parents should forbid their children’s love.
C. Puppy love may bring young people depression.
D. Romance is good for young people.
2.Which of the following is more likely to have depression?
A. Young people who have a strong sense of self.
B. Young boys whose parents watch for their behavior.
C. Careless parents whose children are deep in love.
D. Young girls who always hide their feelings and opinions.
3.What can be inferred from the passage?
A. Lacking love can lead young people to grow up more quickly.
B. The older a woman is, the less likely she seems to lose herself in romance.
C. Parents should help their children to be aware of the signs of depression.
D. Early love makes young people keep close to their friends and parents.
4.What’s the author’s attitude towards puppy love?
A. Confused B. Disinterested
C. Disapproving D. Scared
高二英语阅读理解中等难度题查看答案及解析
A new study of 8,000 young people in the journal of Health and Social Behavior shows that although love can make adults live healthily and happily，it is a bad thing for young people. Puppy love（早恋）may bring stress for young people and can lead to depression. The study shows that girls become more depressed than boys, and younger girls are the worst of all.
The possible reason for the connection between love and higher risk of depression for girls is “loss of self”. According to the study, even though boys would say “lose themselves in a romantic relationship”, this “loss of self” is much more likely to lead to depression when it happens to girls. Young girls who have romantic relationships usually like hiding their feelings and opinions. They won’t tell that to their parents.
Dr Marianm Kaufman, an expert on young people problems, says 15% to 20% young people will have depression during their growing. Trying romance often causes the depression. She advises kids not to jump into romance too early. During growing up, it is important for young people to build strong friendships and a strong sense of self. She also suggests the parents should encourage their kids to keep close to their friends, attend more interesting school activities and spend enough time with family.
Parents should watch for signs of depression—eating or mood changes—and if they see signs from their daughters or sons，they need to give help. The good news is that the connection between romance and depression seems to become weak with age. Love will always make us feel young, but only maturity(成熟) gives us a chance to avoid its bad side effects.
1.What’s the main idea of the passage?
A. Puppy love may bring young people depression.
B. Parents should forbid their children’s love.
C. Romance is a two-edged sword for adults.
D. Romance is good for young people.
2.Which of the following is more likely to have depression?
A. Young people who have a strong sense of self.
B. Young boys whose parents watch for their behavior.
C. Young girls who always hide their feelings and opinions.
D. Careless parents whose children are deep in love.
3.What can be inferred from the passage?
A. Lacking love can lead young people to grow up more quickly.
B. Early love makes young people keep close to their friends and parents.
C. Parents should help their children to be aware of the signs of depression.
D. The older a woman is, the less likely she seems to lose herself in romance.
4.What’s the author’s attitude towards puppy love?
A. Confused B. Disapproving
C. Disinterested D. Scared
高二英语阅读理解中等难度题查看答案及解析
A new study of 8,000 young people in the Journal of Health and Social Behavior shows that although love can make adults live healthily and happily, it is a bad thing for young people．Puppy love（早恋）may bring stress for young people and can lead to depression (沮丧，抑郁）. The study shows that girls become more depressed than boys, and younger girls are the worst of all．
The possible reason for the connection between love and higher risk of depression for girls is “loss of self”．According to the study，even though boys would say “lose themselves in a romantic relationship”，this “loss of self” is much more likely to lead to depression when it happens to girls. Young girls who have romantic relationships usually like hiding their feelings and opinions．They won’t tell that to their parents．
Dr Marianm Kaufman，an expert on young people problems，says 15% to 20% young people will have depression during their growing. Trying romance often causes the depression．She advises kids not to jump into romance too early. During growing up，it is important for young people to build strong friendships and a strong sense of self．She also suggests the parents should encourage their kids to keep close to their friends, attend more interesting school activities and spend enough time with family．
Parents should watch for signs of depression—eating or mood changes—and if they see signs from their daughters or sons, they need to give help. The good news is that the connection between romance and depression seems to become weak with age．Love will always make us feel young，but only maturity （成熟） gives us a chance to avoid its bad side effects．
1.What’s the main idea of the passage?
A. Romance is a double-edged sword for adults.
B. Parents should forbid their children’s love.
C. Puppy love may bring young people depression.
D. Romance is good for young people.
2.Which of the following is more likely to have depression?
A. Careless parents whose children are deep in love.
B. Young people who have a strong sense of selfishness.
C. Young boys whose parents watch for their behavior.
D. Young girls who always hide their feelings and opinions.
3.What can be inferred from the passage?
A. Lacking love can lead young people to grow up more quickly.
B. The older a woman is, the less likely she seems to lose herself in romance.
C. Early love makes young people keep close to their friends and parents.
D. Parents should help their children to be aware of the signs of depression.
4.What’s the author’s attitude towards puppy love?
A. disapproving B. confused
C. neutral D. scared
高二英语阅读理解中等难度题查看答案及解析
A new study of 8,000 young people in the Journal of Health and Social Behavior shows that although love can make adults live healthily and happily, it is a bad thing for young people. Puppy love (早恋) may bring stress for young people and can lead to depression. The study shows that girls become more depressed than boys, and younger girls are the worst of all.
The possible reason for the connection between love and higher risk of depression for girls is “loss of self”. According to the study, even though boys would say “lose themselves in a romantic relationship”, this “loss of self” is much more likely to lead to depression when it happens to girls. Young girls who have romantic relationships usually like hiding their feelings and opinions. They won’t tell that to their parents.
Dr Marian Kaufman, an expert on young people problems, says 15% to 20% young people will have depression during their growing. Trying romance often causes the depression. She advises kids not to jump into romance too early. During growing up, it is important for young people to build strong friendships and a strong sense of self. She also suggests the parents should encourage their kids to keep close to their friends, attend more interesting school activities and spend enough time with family.
Parents should watch for signs of depression--eating or mood changes--and if they see signs from their daughters or sons, they need to give help. The good news is that the connection between romance and depression seems to become weak with age. Love will always make us feel young, but only maturity (成熟) gives us a chance to avoid its bad side effects.
1.Which of the following is more likely to have depression?
A. Young people who have a strong sense of selfishness.
B. Young girls who always hide their feelings and opinions.
C. Young boys whose parents watch for their behavior.
D. Careless parents whose children are deep in love.
2.What can be inferred from the passage?
A. The older a woman is, the less likely she seems to lose herself in romance.
B. Lacking love can lead young people to grow up more quickly.
C. Early love makes young people keep close to their friends and parents.
D. Parents should help their children to be aware of the signs of depression.
3.What’s the author’s attitude towards puppy love?
A. Confused. B. Disinterested. C. Scared. D. Disapproving.
4.What’s the main idea of the passage?
A. Puppy love may bring young people depression.
B. Parents should forbid their children’s love.
C. Romance is a two? edged sword for adults.
D. Romance is good for young people.
高二英语阅读理解中等难度题查看答案及解析
A new study of 8，000 young people in the Journal of Health and Social Behavior shows that although love can make adults live healthily and happily，it is a bad thing for young people. Puppy love (早恋) may bring stress for young people and can lead to depression. The study shows that girls become more depressed than boys，and younger girls are the worst of all.
The possible reason for the connection between love and higher risk of depression for girls is “loss of self”．According to the study，even though boys would say “lose themselves in a romantic relationship”，this “loss of self” is much more likely to lead to depression when it happens to girls. Young girls who have romantic relationships usually like hiding their feelings and opinions. They won't tell that to their parents.
Dr Marianm Kaufman，an expert on young people problems，says 15% to 20% young people will have depression during their growing. Trying romance often causes the depression. She advises kids not to jump into romance too early. During growing up，it is important for young people to build strong friendships and a strong sense of self. She also suggests the parents should encourage their kids to keep close to their friends，attend more interesting school activities and spend enough time with family.
Parents should watch for signs of depression—eating or mood changes—and if they see signs from their daughters or sons，they need to give help. The good news is that the connection between romance and depression seems to become weak with age. Love will always make us feel young，but only maturity gives us a chance to avoid its bad side effects.
1.What's the main idea of the passage?
A. Romance is a two-edged sword for adults.
B. Parents should forbid their children's love.
C. Romance is good for young people.
D. Puppy love may bring young people depression.
2.Which of the following is more likely to have depression?
A. Careless parents whose children are deep in love.
B. Young people who have a strong sense of selfishness.
C. Young girls who always hide their feelings and opinions.
D. Young boys whose parents watch for their behavior.
3.What can be inferred from the passage?
A. The older a woman is，the less likely she seems to lose herself in romance.
B. Lacking love can lead young people to grow up more quickly.
C. Early love makes young people keep close to their friends and parents.
D. Parents should help their children to be aware of the signs of depression.
4.What's the author's attitude towards puppy love?
A. Confused. B. Disapproving.
C. Neutral. D. Scared.
高二英语阅读理解中等难度题查看答案及解析
A new study of 8,000 young people in the Journal of Health and Social Behavior shows that although love can make adults live healthily and happily, it is a bad thing for young people. Puppy love (早恋), may bring stress for young people and can lead to depression. The study shows that girls become more depressed than boys, and younger girls are the worst of all.
The possible reason for the connection between love and higher risk of depression for girls is “loss of self”. According to the study, even though boys would say “lose themselves in a romantic relationship”, this “loss of self” is much more likely to lead to depression when it happens to girls. Young girls who have romantic relationships usually like hiding their feelings and opinions. They won’t tell that to their parents.
Dr.Marianm Kaufman, an expert on young people problems, says 15% to 20% young people will have depression during their growing. Trying romance often causes the depression. She advises kids not to jump into romance too early. During growing up, it is important for young people to build strong friendships and a strong sense of self. She also suggests the parents should encourage their kids to keep close to their friends, attend more interesting school activities and spend enough time with family.
Parents should watch for signs of depression-eating or mood changes-and if they see signs from their daughters or sons, they need to give help. The good news is that the connection between romance and depression seems to become weak with age. Love will always make us feel young, but only maturity gives us a chance to avoid its bad side effects.
1.What’s the main idea of the passage?
A. Romance is a two-edged sword for adults.
B. Puppy love may bring young people depression.
C. Parents should forbid their children’s love.
D. Romance is good for young people.
2.Which of the following is more likely to have depression?
A. Careless parents whose children are deep in love.
B. Young people who have a strong sense of selfishness.
C. Young boys whose parents watch for their behavior.
D. Young girls who always hide their feelings and opinions.
3.What can be inferred from the passage?
A. Lacking love can lead young people to grow up more quickly.
B. Early love makes young people keep close to their friends and parents.
C. The older a woman is, the less likely she seems to lose herself in romance.
D. Parents should help their children to be aware of the signs of depression.
4.What’s the author’s attitude towards puppy love?
A. Confused B. Neutral
C. Scared D. Disapproving
高二英语阅读理解中等难度题查看答案及解析