1、7届高三下学期周练1英语试题附答案河北定州中学2016-2017学年第二学期高三英语周练试题（1）一、阅读理解If you look at the night sky, youll often see stars moving very quickly. In fact, they move much more quickly than they should according to their size and the laws of physics.Scientists do not completely understand why the speed of these stars i
2、s so high. But many believe the reason is that much of the universe is made of something called “dark matter”. Groups of stars called galaxies, such as the Milky Way, might even be made up of 90 percent dark matter. How much something weighs depends on where it is. The same object weighs only half a
3、s much on Mars as it does on Earth and almost three times as much on Jupiter. So scientists prefer to talk about the mass (质量) of something rather than how much it weighs, because mass does not change. They can work out the mass of galaxies by measuring the distance between them and the speed they m
4、ove at. Recently, Jorge Pearrubia, a senior academic at Edinburgh University, UK, and his team discovered something interesting: The mass of the Milky Way is only half as much as the mass of another nearby galaxy, Andromeda. This seems strange, and dark matter may explain why. Finding out more about
5、 dark matter could help us understand how the universe began, but this is not easy. Lots of scientists with different types of expert knowledge are working on the problem.We cant see dark matter, its very difficult to measure and we cant find out its mass. Unlike stars, dark matter doesnt produce or
6、 reflect light. But we can make a good guess that it is there because of the way things move and the way light bends. Experts now think dark matter may be very different from the matter that we find on Earth. There may also be five times as much dark matter in the universe as ordinary matter.1Someth
7、ing that weighs 15kg on Earth weighs about _ on Mars and _ on Jupiter.A. 7.5 kg, 45 kg B. 30 kg, 45 kg C. 45 kg, 7.5 kg D. 5 kg, 30 kg2The author mentions the masses of the Milky Way and Andromeda mainly to _.A. explain why the same object has a different weight on different starsB. compare the dist
8、ance between the Milky Way and AndromedaC. show that studying dark matter could help to answer some scientific questionsD. support the idea that scientists prefer to talk about mass instead of weight3Dark matter is difficult to investigate because _.A. it travels at a very fast speedB. we cant see w
9、here it is or measure its massC. its hard to measure the light it produces and reflectsD. it is much bigger than ordinary matter in size4According to the text dark matter _.A. could accelerate the speed of starsB. could lessen the mass of objects in galaxiesC. makes up the entire universe and its st
10、arsD. may help us identify the origins of the universeWhats the most important thing in life? Peoples answers vary greatly. For British scientist Robert Edwards, the answer is having a child. Nothing is more special than a child, he told the BBC. Edwards, the inventor of the In Vitro Fertilization (
11、IVF) technologymore commonly known as test-tube (试管) baby technologypassed away on April 10, 2013 at the age of 87. Edwards changed the lives of millions of ordinary people who now rejoice (高兴) in the gift of their own child, said Peter Braude, a professor at Kings College London. He leaves the worl
12、d a much better place. Edwards started his experiments as early as the 1950s, when he had just finished his PhD in genetics. At that time, much of the public viewed test-tube babies as scary, according to Mark Sauer, a professor at Columbia University, US. Edwards and his colleague Patrick Steptoe f
13、aced opposition from churches, governments and media, not to mention attacks from many of their fellow scientists. People said that we should not play God and we should not interfere with nature, Edwards once told Times. He said that he felt quite alone at the time. But Edwards was a fighter, and he
14、 believed in what he was doing, said Sauer. Without support from the government, the two struggled to raise funds to carry on. And in 1968 they finally developed a method to successfully fertilize human eggs outside the body. The first test-tube baby was born on July 25, 1978. Her name was Is Louise
15、 Brown. Despite peoples safety concerns, Brown was just as healthy as other children. IVF had moved from vision to reality and a new era in medicine had begun, BBC commented. Ever since then, public opinion has evolved considerably. Couples who were unable to have babies began thronging (拥向) to Edwa
16、rds clinic. Nowadays, Reuters reports, some 4.3 million other test-tube children exist. Edwards received a Nobel Prize in 2010 and was knighted (封为爵士) by Queen Elizabeth in the following year. Before his death, Edwards was still in touch with Louise. He is like a granddad to me, she said in an inter
17、view with the Daily Mail.He is a granddad to millions, in fact.5Whats the article mainly about?A. The first test-tube baby. B. A new era in medicine.C. The inventor of IVF technology. D. The changes IVF technology has brought.6The writer mentioned Peter Braude to . A. show how difficult it was for E
18、dwards to do his workB. describe what kind of person Edwards wasC. explain why he is loved by all childrenD. comment on his achievement7The underlined word opposition in Paragraph 6 is closest in meaning to A. attack B. support C. test D. influence8What is the correct order of events in Edwards life
19、?a. He received a Nobel Prize.b. He struggled to raise funds.c. The first test-tube baby was born.d. He was knighted by Queen Elizabeth II.e. He succeeded in fertilizing human eggs outside body.f. He started his experiments on IVF technology.A. f-e-b-c-a- d B. f-b-e-c-d-a C. f-b-e-c-a-d D. f-e-d-a-c
20、-bA warm drink of milk before bed has long been the best choice for those wanting a good nights sleep. But now a study has found it really does help people nod offif it is milked from a cow at night. Researchers have discovered that “night milk” contains more melatonin(褪黑激素), which has been proven t
21、o help people feel sleepy and reduce anxiety. The study, by researchers from Seoul, South Korea, involved mice being fed with dried milk powder made from cows milked both during the day and at night. Those given night milk, which contained 10 times the amount of melatonin, were less active and less
22、anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food. Night milk quickened the start of sleep and caused the mice to sleep longer. While the effect of cows milk harvested at different times has not been tested on humans up t
23、o now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax. Milk is also sugar-free and additive-free with nutrition
24、ists recommending skimmed milk as the best choice before bed as it is the least fattening. The more fat you take in before bedtime, the greater burden you will put on your body at night.9According to the text, the mice fed with daytime milk_.A. started sleep more easily B. were less activeC. were mo
25、re anxious D. woke up later10Which of the following is TRUE of melatonin according to the text?A. Its used in sleeping drugs B. It exists in milk in great amount C. It can make people more energetic D. Its been tested on mice for ten years 11What can be a suitable title for the text?A. Milk Drinking
26、 and Health B. Fat, Sugar and HealthC. An Experiment on Mice D. Night Milk and Sleep12How does the author support the theme of the text?A. By giving examples.B. By providing research results. C. By explaining statistical data.D. By stating argumentsIs it possible that the sinking of the Titanic was
27、caused by a ghost? A lot of the story below is true but did it really happen quite like this?Our story begins not in the icy cold waters of the North Atlantic, but rather thousands of miles away in Egypt. It is here, perhaps, that we can find the start of the mystery of the Titanic, in the year 1910
28、, in the great city of Cairo. One day, a famous professor of Egyptian history called Douglas Murray was staying in Cairo, when he was contacted by an American adventurer. The American had something unusual to offer Murray, something that was certain to thrill him: a beautiful ancient Egyptian mummy
29、case, containing the mummy of an Egyptian queen. It was over 3000 years old, but in beautiful condition - gold, with bright paintings on it. Murray was delighted with both the object and the asking-price. He gave the man a cheque immediately. The cheque was never cashed. That evening the American ad
30、venturer died. For his part, Murray arranged to have the treasure sent back to Britain. However, it was not long before he learnt more about the beautiful mummy case: On the walls of the tomb in which it had been discovered, there were messages which warned of terrible consequences to anyone who bro
31、ke into the tomb. Murray was disbelieving of these warnings until a few days later, when a gun he was holding exploded in his hand, shattering his arm. The arm had to be cut off. After the accident, Murray decided to return to his homeland. On the return journey, two of his companions died mysteriou
32、sly, and two servants who had handled the mummy also passed away. The now-terrified Murray decided he would get rid of the cursed case as soon as he arrived in London. A lady he knew named Janet Jones said she would like it, so he gave it to her. Shortly afterwards, Jones mother died, and she herself caught a strange disease. She tried returning the mummy, but naturally Murray refused it. In the end, it was presented to t
