Pandas are rare animals close to ___________....

Pandas are rare animals close to ___________. They have now been listed among the world’s most endangered wildlife animals.

A. distinction　　 B. emergence　　 C. intension　　　　 D. disappearance

高三英语单项填空中等难度题查看答案及解析

Pandas are rare animals close to ___________. They have now been listed among the world’s most endangered wildlife animals.

A. extinction,　　 B. emergence

C. intension　　　　 D. disappearance

高三英语单项填空中等难度题查看答案及解析

Wild animals ________ tigers and pandas are becoming rare.

A. as follows      B. for example      C. such as         D. for instance

高三英语单项填空中等难度题查看答案及解析

The pandas are very dear to human beings. So people have been doing　 　 they take to save them.

A. whichever 　 B. however　　 C. whatever 　 D. whoever

高三英语单项填空中等难度题查看答案及解析

Do you have good friends? Do you sometimes feel so close to them that they are like family to you?

It turns out that this isn’t just an expression. A study by Yale University and the University of California, San Diego, has found that you and your friends have more genes in common than strangers do, the Guardian reported.

Researchers looked at the genes of 1,932 people and compared them in pairs of unrelated friends and strangers. They found that friends have 1 percent of genes that match.

“One percent may not sound like much to the layperson (外行), but to geneticists (遗传学家) it is a significant number,” Professor Nicholas Christakis of Yale University told Discovery News. In fact, this is the same amount of genes you share with your fourth cousins, those who have the same great-great-great grandparents as you.

So is it a coincidence that you become friends with people who share your genes? Not at all. In fact, it is evolution that brings you together.

People who share certain genes also share skills and have similar likes and dislikes, researchers said. In ancient times, it was critical that people who were alike stayed together. For example, people who had a similar susceptibility (易感性) to the cold were more likely to help each other build a fire, giving them a better chance to survive.

Researchers also found that among all the genes studied, those affecting sense of smell were the most similar in friends. This is probably because people who smell things in the same way are more easily drawn to similar environments. For example, people who like the smell of coffee may hang out at cafes more often and are therefore more likely to meet and become friends with each other.

Based on their findings, the team has developed an interesting test called the “friendship score”. It calculates how big the chances are that two people will be friends by studying their genes.

So, here is a question for you: would you like to take this test and know in advance who your friends are going to be, or would you still prefer to figure it out by yourself and let time be the judge?

1.What is the author’s main purpose in writing the article?

A.To explain why friends share skills and interests.

B.To report on recent findings about making friends.

C.To analyze what influences the way people make friends.

D.To explain an interesting test called the “friendship score”.

2.According to the researchers of the study, people _______.

A.form friendships by complete coincidence

B.are genetically similar to their friends, compared to strangers

C.make friends with those who share nearly 10 percent of their genes

D.may share more similar genes with their friends than with their fourth cousins

3.With the examples of ancient people developing the ability to speak and helping each other build a fire, the author intends to _______.

A.show how ancient people helped each other survive

B.explain that similar interests are what lead to friendship

C.show that it is evolution that brings friends together

D.tell us why it was easier for ancient people to find friends

4.According to the article, people with similar genes that affect their sense of smell ______.

A.like to hang out at cafes more often

B.are easily attracted to the smell of their friends

C.are more likely to be attracted to a similar environment

D.can identify people in a crowd who can become friends

高三英语阅读理解中等难度题查看答案及解析

Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need．It has been demonstrated（证明）that rats will, when given a choice over a period of time, prefer water with vitamins(维生素) to water without vitamins even though there is no difference in taste or smell between the two water bottles．When a fragrant（香的）flavor（作料）was added to the vitamin-enriched water, the rats did seem to prefer it and kept drinking it ,even after the vitamins were switched to the clear water．In time, however, they broke the habit and went back to where the necessary vitamins were．

In a classic experiment, babies of 6 to 12 months old were placed in a cafeteria（自助） feeding arrangement, with a wide selection of baby food before them．They were given whatever food they pointed to or appeared interested in．We are told that at first they showed some unusual eating patterns, but that over a period of time they managed to select well-balanced diet．

So, in choosing food, rats and babies do seem to know and act on what's best for them．Apparently, there is a kind of “body wisdom”, which humans soon lose．Most of us do not eat as wisely as we could．Many of our food preferences are culturally determined and influenced by long-formed habits．Some people eat fox, dog and blackbirds, while we eat cows and pigs．So what people eat and how much they eat seems to be greatly influenced by what is going on around them．

1.In the experiment on rats, a fragrant flavor was added to the rats’ drinking water to _____________ .

A．encourage rats to drink vitamins-enriched water

B．test whether rats know which drink is good for them

C．find out rats’ preference in flavor

D．demonstrate the vitamins are tasteless

2.According to the passage ,adults eating habits differ from those of babies because_________．

A．adults know better than babies what kind of food are good for their health

B．adults usually cannot resist the temptation of various delicious foods

C．adults have more choices of food than babies in eating patterns

D．adults' eating habits are closely related to the social and cultural customs

3.The author implied in the passage that most of us_________．

A．eat a balanced diet

B．choose the food that is of nutrition

C．have the habits influenced by the surroundings

D．like to eat the food with a fragrant flavor．

4.As far as their eating habits are concerned, babies and rats are similar in that_________．

A．both prefer flavored food and drink

B．both have the wisdom to choose a balanced diet

C．both have the same eating patterns

D．both develop a taste for the same kinds of flavors

高三英语阅读理解中等难度题查看答案及解析

Blue whales are the largest animals ever known to have existed on the planet, and they can grow to a length of 100 feet and weigh more than 330,000 pounds.　 But recently researchers have found that these whales are on the move and they have migrated from California waters to areas off Canada and Alaska for the first time since commercial whaling ended in 1965.

The researchers identified 15 blue whales that have appeared off the coast of British Columbia and the Gulf of Alaska since 1997. Four of these whales were recognized as ones that were once sighted off California shores, suggesting that the whales are returning to an old migration pattern between the coasts.

Before commercial whaling began in the early 1900s, blue whales were found widely throughout the North Pacific and California waters. But from the 1920s to the 1960s,whaling severely reduced the whale populations. Blue whales never recovered in the Northern Pacific, making sightings in this area rare.　 However, much larger groups of whales have been observed close to California since the 1970s.

The scientists had previously thought that the California population was separate from the population that had historically lived in North Pacific waters. But the current study shows that whales off the coast of British Columbia and the Gulf of Alaska are likely part of the California population.

To identify the blue whales, the researchers looked at photos of cetaceans taken in the North Pacific Ocean and compared them with a library of blue whale pictures taken along the West Cost of the United States and Southern Pacific. Up to now, the researchers are not quite sure why the whales are changing their migration patterns, but they suspect that the whales may be following their food moving farther north by the changes in ocean conditions.

1.According to the passage, blue whales are 　　　　　　 .

A. following a fixed route of migration

B.　 dying out due to commercial whaling

C. moving from the south to the north

D. rarely found in the Southern Pacific

2.The whale population in the northern Pacific　　　　　　 .

A. is different from the California population

B. is probably part of the California population

C. has become the largest group since the 1970s

D. has lived there since the 1960s

3.The underlined word "cetaceans" in Paragraph 5 probably means 　　　　　　 .

A. land creatures　　　　　　　　　　　　　　　 B. whale species

C. ocean conditions　　　　　　　　　　　　　　 D. migration patterns

4.What might make blue whales migrate according to the researchers?

A. Commercial whaling.　　　　　　　　　　　　 B. Weather conditions.

C. Life reproduction.　　　　　　　　　　　　　 D. Food resources.

高三英语阅读理解中等难度题查看答案及解析

Blue whales are the largest animals ever known to have existed on the planet, and they can grow to a length of 100 feet and weigh more than 330,000 pounds. But recently researchers have found that these whales are on the move and they have migrated (moved) from California waters to areas off Canada and Alaska for the first time since commercial whaling ended in 1965.

The researchers identified 15 blue whales that have appeared off the coast of British Columbia and the Gulf of Alaska since 1997. Four of these whales were recognized as ones that were once sighted off California shores, suggesting that the whales are returning to an old migration pattern between the coasts.

Before commercial whaling began in the early 1900s, blue whales were found widely throughout the North Pacific and California waters. But from the 1920s to the 1960s, whaling severely reduced the whale populations. Blue whales never recovered in the Northern Pacific, making sightings in this area rare. However, much larger groups of whales have been observed close to California since the 1970s.

The scientists had previously thought that the California population was separate from the population that had historically lived in North Pacific waters. But the current study shows that whales off the coast of British Columbia and the Gulf of Alaska are likely part of the California population.

To identify the blue whales, the researchers looked at photos of cetaceans taken in the North Pacific Ocean and compared them with a library of blue whale pictures taken along the West Coast of the United States and Southern Pacific. Up to now, the researchers are not quite sure why the whales are changing their migration patterns, but they suspect that the whales may be following their food moving farther north by the changes in ocean conditions.

1.According to the passage, blue whales are __________.

A. following the fixed route of migration

B. dying out due to commercial whaling

C. rarely found in the Southern Pacific

D. moving from the south to the north

2.The whale population in the northern Pacific __________.

A. is different from the California population

B. has become the largest group since the 1970s

C. is probably part of the California population

D. has lived there since the 1960s.

3.The underlined word “cetaceans” in Paragraph 5 probably means __________.

A. whales species　　　　 B. land creatures

C. ocean conditions　　 　 D. migration patterns

4.What might make blue whales migrate according to the researchers?

A. Commercial whaling.　　　 B. Food resources.

C. Weather conditions.　　　 D. Life reproduction.

高三英语阅读理解中等难度题查看答案及解析

The rare animals would die _______ if men were allowed to shoot as many as they wished.

A. out　　 　 B. up　　 C. down　　 D. away

高三英语单项填空中等难度题查看答案及解析

What are they doing now?

A. They are having a rest.

B. They want to keep something.

C. They are climbing a hill.

高三英语短对话简单题查看答案及解析