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2.Why is the man unhappy?
A.He was fired.
B.He didn't get promotion.
C.He didn't find a job.
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12.If you think a high-factor sunscreen (防晒霜)keeps you safe from harmful rays,you may be wrong.Research in this week's Nature shows that while factor 50reduces the number of melanomas(黑瘤)and delays their occurrence,it can't prevent them.Melanomas are the most aggressive skin cancers.You have a higher risk if you have red or blond hair,fair skin,blue or green eyes,or sunburn easily,or if a close relative has had one.Melanomas are more common if you have periodic intense exposure to the sun.Other skin cancers are increasingly likely with long-term exposure.
There is continuing debate as to how effective sunscreen is in reducing melanomas the evidene is weaker than it is for preventing other types of skin cancer.A 2011Australian study of 1,621people found that people randomly selected to apply sunscreen daily had half the rate of melanomas of people who used cream as needed.A second study,comparing 1,167people with melanomas to 1,101who didn't have the cancer,found that using sunscreen routinely,alongside other protection such as hats,long sleeves or staying in the shade,did give some protection.This study said other forms of sun protection not sunscreen seemed most beneficial.The study relied on people remembering what they had done over each decade of their lives,so it's not entirely reliable.But it seems reasonable to think sunscreen gives people a false sense of security in the sun.
Many people also don't use sunscreen properly applying insufficient amounts,failing to reapply after a couple of hours and staying in the sun too long.It is sunburn that is most worrying recent research shows five episodes of sunburn in the teenage years increases the risk of all skin cancers.
The good news is that a combination of sunscreen and covering up can reduce melanoma rates,as shown by Australian figures from their slip-slop-slap campaign.So if there is a heat wave this summer,it would be best for us,too,to slip on a shirt,slop on (抹上)sunscreen and slap on a hat.
33.What is people's common expectation of a high-factor sunscreen?A
A.It will delay the occurrence of skin cancer.
B.It will protect them from sunburn.
C.It will keep their skin smooth and fair.
D.It will work for people of any skin color.
34.What does the research in Nature say about a high-factor sunscreen?B
A.It is ineffective in preventing melanomas.
B.It is ineffective in case of intense sunlight.
C.It is ineffective with long-term exposure.
D.It is ineffective for people with fair skin.
35.What do we learn from the 2011Australian study of 1,621people?D
A.Sunscreen should be applied alongside other protection measures.
B.High-risk people benefit the most from the application of sunscreen.
C.Irregular application of sunscreen does women more harm than good.
D.Daily application of sunscreen helps reduce the incidence of melanomas.
13.How do the speakers feel?
A.Defeated.
B.Tired.
C.Excited.
10.What's the weather like today?
A.Cold.
B.Cool.
C.Hot.
17.Shegraduated(毕业) from Harvard last year.
7.What is the man's problem?
A.He is stressed.
B.He can't find his dog.
C.He doesn't like his work.
14.A.His computer doesn't work well.
B.He isn't getting along with his stuff.
C.He didn't register for a proper course.
D.He can't apply the theory to his program.
11.For people who are interested in space,nothing is more exciting than the idea of life on other planets.At first,when Mars showed signs of having life,everyone was excited.The idea has inspired many films and stories including The Martian(《火星救援》),which shows a man struggling to survive on Mars.But would it actually be possible to live there?
While the idea of living on Mars is great,the reality does not look as good.Mars does not have a friendly atmosphere(大气) for humans.There is very little oxygen(氧气)there,and because of the distance from the sun,It is also very cold.The temperature on Mars can be-62℃on average.This is much too cold for humans,
However,scientists say it might be possible to live there without an atmosphere.Mars has a similar amount of daytime to Earth,which means there's enough sunlight to grow plants inside safe buildings.However they would have to grow in soil from Earth.Mars does not have a strong enough atmosphere to stop the radiation(辐射) from space,which makes it dangerous to grow things in the soil.
Also,the radiation causes problems to our health.One way we could survive the radiation and cold temperature would be to build homes under the ground or within the rocks(岩石) on the planet.These would give humans the heat and protection the planet doesn't have.
Although it's a long time before we would be able to live on Mars,NASA is hoping to make some progress within the next 20years.
32.The film The Martian is mentioned in Paragraph 1toC.
A.show people's knowledge of Mars
B.tell readers something about the film
C.introduce the topic of living on Mars
D.explain the development of the film-making business
33.Which of the following about Mars is NOT true?C.
A.The temperature is cold.
B.There is very little oxygen.
C.Plants can grow on Mars easily.
D.Humans can possibly live on Mars.
34.Which is a good condition for humans to survive on Mars?B.
A.Mars has an atmosphere OK for humans.
B.Mars can get enough sunlight in the day.
C.The temperature is OK though quite cold.
D.Mars has soil for the plants to grow well.
35.What does the fourth paragraph mainly talk about?C.
A.How to protect Mars.
B.How to build homes on Mars.
C.What problems the radiation causes.
D.How to avoid bad conditions on Mars.
12.What is the woman probably now?
A.A headmaster.B.A writer.C.A student.
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