In recent years there has been a steady attac...

In recent years there has been a steady attack on salt from the doctors; salt is bad for you-regardless of your health. Politicians also got aboard."There is a direct relationship" US Congressman Neal Smith said "between the amount of sodium (钠) a person consumes and heart disease circulatory（循环的)disorders stroke and even early death."

Frightening if true! But many doctors and medical researches are now beginning to feel the salt scare has gone too far."All these remarks and cry about salt is unnecessary" Dr. Dustan. insists. "For most of us it probably does not make much difference how much salt we eat." Dustan's most recent short-term study of 150 people showed that those with normal blood pressure experienced no change at all when placed on an extremely low-salt diet or later when salt was reintroduced. Of the hypertensive (高血压的) patients however half of those on the low-salt diet did experience a drop in blood pressure which returned to previous level when salt was reintroduced.

"An adequate to somewhat excessive (过度的)salt intake has probably saved many more lives than it has cost in the general population" said Dr. John H Laragh. "So an opinion that the whole population should avoid salt makes no sense."

Medical experts agree that everyone should practice reasonable “moderation” （节制)in salt consumption. For the average person a moderate amount might run from four to ten grams a day or roughly 1/ 2 to 1/3 teaspoons. One to two grams of salt would come from the natural sodium in food. The rest would be added in processing preparation or at the table.

"Na is not your enemy "says Comek’s Dr.Laragh. "Salt is the No.1 natural component of all human tissue and the idea that you do not need it is wrong. Unless your doctor has proven that you have a salt-related health problem，,there is no reason to give it up. "

1.What did Neal Smith think of eating salt?

A.It was necessary.

B.It could lead to some diseases.

C.It was not related to heart disease.

D.It should be guided by the government.

2.What can we infer from Dr. Dustan's study?

A.It's reasonable to have the salt scare.

B.A low-salt diet may be good for some people.

C.The reduction of salt consumption can cure a hypertensive patient.

D.The amount of salt consumption has nothing to do with one's blood pressure.

3.What advice does Dr Laragh give in Para 3?

A.Experts should promote their study of salt.

B.Patients should eat adequate amounts of salt.

C.Doctors should not advise patients to avoid salt.

D.People should not be afraid of taking a bit excessive salt.

4.What does the author mainly want to tell us in the text?

A.The salt scare is still on.

B.Salt consumption has caused many problems.

C.The moderate use of salt is recommended.

D.The cause of hypertension is now understood.

高一英语阅读选择中等难度题查看答案及解析

A report has recently been published about what the earth might be like 20 years or so from now on. The report is a result of a three-year46.

According to the report, the picture of the earth in the year 2020 is not a47one. The world will be more48because the population will continue to grow. The population could be499,000 million, almost 3,000 million more than that in 2009. More people would move into cities, especially cities in50countries. Cities in India and Thailand probably would51have a population of 20 million by then.

Food production will52, but not enough to feed all the people. Farmers will grow 90% more food than they did in 2009,53most of the increase would be in countries that54produce enough food for their people. Little increase is55 in South Asia, Africa or the Middle East. Poor farming ways are  56large areas of cropland, changing farms into deserts. More farmland is57as cities become larger and more houses are built.58will get worse as developed countries burn more coal and oil. Many of the world’s59could disappear as more and more trees are cut down. Energy will continue to be a serious problem. The experts say their60 of the earth for the year 2020 may be wrong. They only 61 the situation as it is today. By changing the situation, by62the problems, the picture can be changed. There is63time for the nations of the world to64 a plan of action. But they considered that  65too long to make a decision would greatly reduce the chances of success

2.A.pleased    B.pleasant                  C.safe                         C.blue

11..

17..

18..

高一英语完型填空中等难度题查看答案及解析

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

In recent years, research on the human brain has been attracting more and more scientists.　 1.　 If we compare a human brain to a hard disc(硬盘), what the scientists are doing is to make better use of the hard disc.

Experiments have started on animals. In 1999, a transplant(移植) experiment was done at the Defense and Military Physiology Research Institute in the U.S. and turned a bear into a dolphin(海豚). 　 2.　 They were made of the memory area in the dolphin’s brain containing information about swimming. They obtained a series of useful information, which was saved into a button-sized chip(芯片). Later the information was transplanted into the action memory area in the bear’s brain. 　 3.　 It proved to be a highly successful experiment and a bear was turned into a dolphin.

Not long ago, another memory transplant was performed at the Motor Nerve Research Institute of the University of California. The experiment had an entire transplant of the memory area. 　 4. The transplant was performed from a dog named “Genius” to a dog named “Idiot”. “Genius” could understand and follow up to 100 gestures and orders made by its master. It was a real genius in memorizing. However, “Idiot” had no contact with people at all since its birth. It became an animal with nothing in its brain, without any memory.

5.　 When the two dogs woke up, “Idiot” had grasped all the abilities “Genius” had; it was good at memorizing and sensible. It could follow every gesture and any command given by its master. But “Genius” gave no response to its master, and in fact did not recognize him at all.

A. The experiment was a complete success.

B. Then it was released(释放) by means of electric power.

C. One of the latest research topics is how to change the human brain or combine it with the computer.

D. Different images have different meanings in the memory area.

E. It included actions, moods, logic, words, images, etc.

F. Discoveries show that messages are carried by the central nervous system in the brain.

G. Using the most advanced technology, detailed images were produced.

高一英语七选五中等难度题查看答案及解析

Do you think alien beings exist somewhere in the universe? It seems like Mars, our closest neighbor, has inspired the most science fiction as the place where aliens are most likely to come from. Recent Mars probes (探测) have shown us that there is no life on that planet—at least not now. But that does not mean that life does not exist elsewhere—after all, the universe is really big. A lot of scientific research is going on in the search for “extraterrestrial life”.

Think about it—why should the seven billion people on this little planet be the only living beings in the universe? It would, in fact, seem logical that this is not the case. So scientific research in this matter is based around the idea of finding other planets that have environments that can support life —environments similar to the Earth. The search is on for the evidence of the existence, or earlier existence of life: from very wise beings to simple organisms (有机物).

So far, there have been a number of theories as to which planetary bodies may have an atmosphere that can support such life and therefore deserve closer attention. As for places within our own Milky Way Galaxy, it has been assumed over the decades that Mars and Venus, as well as some of the moons of Jupiter and Saturn, may have been hosts for life. Now, as technologies have improved and we can obtain measurements of the composition of the atmosphere on extra-solar planets, the chances of finding “alien” life forms are increasing.

There has been a theory that some of the planets in the habitable zone of the red dwarf star Gliese 581 may be able to support life. In 2007, scientists discovered exoplanet Gliese 581c—and felt that its atmosphere was most suitable for supporting life. But further research revealed that it would not. Now, attention has been turned to Gliese 581d, at the outer edge of the star’s habitable zone. The main standards for deciding whether a planetary body can be life-supporting are atmospheric conditions which allow the existence of water. Gliese 581 is about 20. 4 light years away from the Earth, so even if life does exist there, the distance would mean that communication would be unlikely.

Having said this—who says alien life forms (if they exist) need water?

1.What does the underlined part in Paragraph 1 mean?

A.Life existing outside of the Earth.

B.The evidence of the existence of life.

C.Other faraway planets in the universe.

D.Creatures known from science fictions.

2.What makes it possible for people to find “alien beings”?

A.Modern scientific theories. B.Atmospheric conditions.

C.Environments similar to the Earth. D.Advanced technologies.

3.From the passage, we know that _________.

A.the atmosphere of Gliese 581c was most suitable for life

B.it is not certain whether alien life forms need water or not

C.the 7 billion people on the Earth are the only beings in the universe

D.the distance of 20. 4 light years makes it impossible to find life on Gliese 581d

4.Which of the following is the best title for the passage?

A.Do Aliens Exist? B.Is Mars Suitable for Life?

C.Are Alien Life Forms Various? D.Can We Communicate with Aliens?

高一英语阅读选择中等难度题查看答案及解析

There has been a _______ increase in the temperature on the earth for about 100 years, but few people notice it.

A. loose　　　　 B. gradual　　 C. spare　　　　 D. fluent

高一英语单项填空中等难度题查看答案及解析

The Great Barrier Reef has seen its third mass bleaching (大规模白化) event in five years. For the first time, all three sections of the Australian reef have been badly affected. The damage happened in February when the area was exposed to the hottest month of water temperatures on record.

Surveys conducted by Terry Hughes at James Cook University in Australia and his team during March made it known that 25 percent of the reef had been badly bleached and 35 percent bleached to some degree. The northern, central and southern sections of the reef were all hit.

Terrible bleaching also struck in 1998, 2002, 2016 and 2017, but was limited to one or two sections. This is the first time that all three sections have experienced terrible bleaching at exactly the same time, says Hughes. “It’s heartbreaking.”

Some of the damaged corals（珊瑚）will survive, including more heat-resistant（耐热的） species. But many others were probably “literally cooked” at the peak of the heatwave in early 2020, says Hughes. Others will die more slowly from stress over the next few months, he adds. Hughes has serious concern about the southern reef, which was mostly unaffected in former bleaching events and hasn’t developed the same heat resistance as other parts.

The 2016 and 2017 events killed about half the coral on the reef. It usually takes a decade for even fast-growing corals to recover, meaning the latest damage will seriously weaken the reef’s ability to recover, says Hughes. The high frequency of mass bleaching in recent years has been driven by climate change, which results from human activity and is steadily raising ocean temperatures. The only way to deal with the problem is to immediately reduce the release of greenhouse gases, says Hughes.

1.What can we learn from the surveys by Hughes and his team?

A.The entire reef has experienced bleaching.

B.The surveys about the reef are done once a year.

C.The hottest month of water temperatures is February.

D.60 percent of the reef suffered from serious bleaching.

2.Why is Hughes worried about the southern reef most?

A.Many corals will die slowly from stress.

B.It has been badly bleached for several years.

C.It hasn’t formed the ability to fight against the heat.

D.The government hasn’t shown any concern about it.

3.What is this text mainly about?

A.Surveys on reef bleaching.

B.A report on climate change.

C.An investigation into global warming.

D.Warning messages on human activities.

高一英语阅读选择中等难度题查看答案及解析

Shawn Dromgoole is a 29-year-old black man who has lived in the same neighborhood his entire life. His family has been in the neighborhood for 54 years. But Dromgoole said that since he was a child, he felt an unease in his hometown, strongly aware that few people looked like him.

“Growing up in my neighborhood, I could always feel the eyes, the looks and the cars slowing down as they passed by me, ” said Dromgoole, who was recently told to stay away from his job temporarily because of the epidemic (疫情) .

As a young man, Dromgoole watched from his window as the neighborhood gradually changed before his eyes: Black families moved out and white families moved in. With each passing year, he felt more and more unwelcome, he said.

Those feelings grew in recent weeks when he heard about Ahmaud Arbery, a black man who was out jogging in Georgia when he was shot to death, and then George Floyd, a black man killed while in police custody (羁押) in Minneapolis. “What happened to these men could easily happen to me,” said Dromgoole. “I became scared to walk past my porch.”

There were also frequent postings on Nextdoor, an app that connects neighbors, warning residents to look out for “suspicious black men,” he said. Filled with fear, Dromgoole took to Facebook and Nextdoor, deciding to finally share his own post. “Yesterday, I wanted to walk around my neighborhood but the fear of not returning home to my family alive kept me on my front porch,” he wrote.

Unexpectedly, responses from his community started pouring in. Neighbors, none of whom Dromgoole had ever spoken with, asked if they could join him on a walk. “Neighbor, after neighbor, after neighbor started reaching out, telling me they wanted to walk with me,” he said.

Last Thursday afternoon, Dromgoole notified his neighbors that he was going for a walk at 6 p. m, and anyone who wanted to join him was welcome.

Dromgoole tied his shoes, ventured (冒险) off his porch and walked to the meeting spot in a nearby parking lot.

There he found 75 people waiting for him.

1.According to the passage,which of the following is NOT true?

A.Dromgoole lives in the same neighborhood for a long time.

B.Dromgoole was out of work recently at his advanced age.

C.Dromgoole felt anxious and unwelcome in his hometown.

D.Dromgoole’s neighborhood has changed a lot before his eyes.

2.What does the author mean by mentioning the two things in Paragraph 4?

A.The racial discrimination(歧视)is in existence in Dromgool’s country.

B.People who were out jogging in Georgia is likely to be shot.

C.The police in Minneapolis has no right to kill people.

D.The human rights should be respected in Dromgool’s country.

3.Dromgoole shared his own post on Facebook and Nextdoor to_________.

A.persuade his neighbors to walk with him

B.show his will to make friends with others

C.express his fear of probably being hurt

D.promote the development of his community

4.What do you think the author’s feeling is after he found 75 people waiting for him?

A.amazed B.frightened

C.puzzled D.indifferent

高一英语阅读选择中等难度题查看答案及解析

Recently, a survey has been made about the common view on graduates(毕业生)from key universities.1.(actual)，this is not the first time that this kind of survey 2.(be) made. Sadly , these graduates are not highly3.(think) of, as only 28% of the companies are 4. (satisfy)with these graduates. More than one company says the graduates only concern 5.(they) about their own matters and lack teamwork spirit. Besides, they may have trouble6. (communicate) with others; because of that, they suffer from7. (lonely) easily.

Believe it8. not, most companies don’t think9. necessary to employ graduates from key universities. It is students’ overall(全面的) abilities10. matter most in job hunting.

高一英语语法填空困难题查看答案及解析

Throughout Europe golf has been popular for many years. A recent report says that in Great Britain alone, 700 new golf courses (球场) will have to be built over the next ten years to satisfy people’s demand.

This is all good news for golf lovers, but it worries those who want to protect the environment. Their argument is that the new courses are disturbing the balance of nature. Woods, ponds and fields are being dug up to make way for the courses. The birds and animals that used to live there are being killed or forced to leave. The amount of water that a club uses to keep its course in good condition is reducing the amount of water available for industrial and other uses. The chemicals used to control insects are sinking into the underground water.

There may be some truth in this, but it is not the whole truth. The days are long past when building of any kind was allowed in beautiful places with no thought for the environment. Planning permission, nowadays, is as strict for golf courses as it is for any other type of development. Before any such project is given the go-ahead, many factors are studied. It is only when it is clear that no harm will be done to the area that the builders are allowed to move in.

A strong case can even be made that golf courses are actually good for the areas where they are built. Courses are built in areas which are not areas of natural beauty. The new courses often make the area livelier. To make holes more difficult, trees are planted and lakes are filled in around greens. Not surprisingly perhaps, it is not unusual to find that, within months of a course being completed, a whole variety of animals and birds have moved in.

Obviously, careful thought has to go into the design of the new courses. As few changes as possible should be made to the natural environment. The wild-life and woods should also　 be protected. But this can be, and is being, done. There is no reason why golfers and nature cannot live peacefully together.

1.What is TRUE about building a new golf course nowadays?

A.It takes up too much land.

B.A lot of trees have to be cut down.

C.It is easy to get planning taken into consideration.

D.Many things will be taken into consideration.

2.What can we infer from Paragraph 4?

A.That a whole variety of animals and birds have moved in the courses is uncommon.

B.Only when it is clear that no harm will be done to the area, are the builders allowed to move in.

C.Golf courses could make local areas look beautiful.

D.Golf courses’ construction wastes too much water and money.

3.Which of the following shows the structure (结构) of the text? (P=paragraph)

A. B.

C. D.

高一英语阅读理解困难题查看答案及解析

The science of computer, ______ rapid progress has been made in recent years，plays a very important role in our daily life.

A. from which　　　　 B. for which

C. with which　　　　 D. to which

高一英语单项填空中等难度题查看答案及解析