【题目】阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
Scientists have discovered that__ __ (stay) in the cold could help us lose weight. Researchers at the University of California found that exposure to the cold increases levels of a protein that helps form brown fat—the type of fat that produces heat and keeps us warm. Brown fat burns energy, __ __ helps us lose weight. White fat stores extra energy, which results __ __ weightgain. The researchers said that because air conditioning and heating give us constant, __ __ (comfort) temperatures, our body's need for brown fat has decreased. They found that:“Outdoor workers in northern Finland who __ __ (expose) to cold temperature have __ __ significant amount of brown fat when __ __(compare) to same aged indoor workers.”
The research was conducted on two different control groups of mice. __ __ group was injected with the protein that helps create brown fat. This group later gained 30% less weight after both groups were fed high fat diets.The researchers say this could be good news in the fight against obesity. People who are obese have __ __ (low) levels of brown fat than thinnerpeople. Head researcher Hei Sook Sul said: “This protein could become an important target for research into the treatment and prevention of obesity and obesity related diseases.” She added:“If you can somehow increase levels of this protein, you could __ __(possible) lose more weight even if eating the same amount of food.”

【题目】阅读理解
In an ideal world,people would not test medicines on animals. Such experiments are stressful and sometimes painful for animals,and expensive and time-consuming for people. Yet animal experimentation is still needed to help bridge vast gaps in medical knowledge. That is why there are some 50 to 100 million animals used in research around the world each year.
Europe,on the whole,has the world's most restrictive(严格的) laws on animal experiments. Even so,its scientists use some 12 million animals a year,most of them mice and rats,for medical research. Official statistics show that just 1.1 million animals are used in research in America each year. But that is misleading. The American authorities do not think mice and rats are worth counting and,as these are the most common laboratory animals,the true figure is much higher. Japan and China have even less comprehensive(全面的) data than America.
Now Europe is reforming the rules governing animal experiments by restricting the number of animals used in labs. Alternatives to animal testing,such as using human tissue or computer models,are now strongly recommended. In addition,sharing all research results freely should help to reduce the number of animals for scientific use. At present,scientists often share only the results of successful experiments. If their findings do not fit the hypothesis(假设) being tested,the work never sees the light of day. This practice means wasting time,money,and animals' lives in endlessly repeating the failed experiments.
Animal experimentation has taught humanity a great deal and saved countless lives. It needs to continue,even if that means animals sometimes suffer. Europe's new measures should eventually both reduce the number of animals used in experiments and improve the way in which scientific research is conducted.
(1)What is the main idea of this passage?
A.The success of animal experiments should be ensured.
B.A ban on the use of animals in the lab should be enforced.
C.Greater efforts need to be taken to reduce the number of lab animals.
D.Scientists should be required to share their research results with each other.
(2)Which of the following statements is true about animals used in the lab?
A.America uses only about 1.1 million lab animals per year.
B.Europe does not use mice and rats as lab animals at all.
C.Britain does not use as many lab animals as China does.
D.Japan has limited data on the number of lab animals used each year.
(3)Which of the following is mentioned as an alternative to replace animal experiments?
A.Statistical studies.
B.Computer models.
C.DNA planted in animals.
D.Tissue from dead animals.
(4)What usually happens to unsuccessful animal experiments?
A.They are not made known to the public.
B.They are made into teaching materials.
C.They are collected for future publication.
D.They are not removed from the research topic list.

【题目】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。

Palm oil(棕榈油) is the most widely used vegetable oil worldwideIt’s found in a wide variety of products from of vitamins to chocolate and bread1 The former makes it easy to spreadwhile the latter makes it good for our body

But the oil’s popularity comes at a high price2 As a resultthousands of acres of rainforests in Indonesiathe world’s biggest palm oil producersare being destroyed to make room for them

With half of the world’s palm oil coming from Indonesiaorangutans(猩猩) have suffered a lot3 What’s worsein 2015wildfires endangered one-third of the remaining orangutansPalm oil farms have also threatened tigers and elephants and caused water and air pollution

4 Howeverit’s not easy given that no other natural vegetable oil has both of its qualitiesNowscientists are creating a new oil to replace it by using food waste and Mpulcherrimaa yeast(酵母) that grows on leavesfruits and flowers5 Besides, the yeast can be widely produced in any weatherThe scientists say their biggest challenge was to find a cheap way to change the sugars in the food waste to a form that the yeast can take in easilyThe team is now trying to test if they can produce the oil at a lower cost

APalm trees need lots of land to grow

BThe easiest solution is to stop using palm oil so widely

CThe palm oil is so expensive that many families can’t afford it

DIn the last 20 yearsover 80% of their habitat has been destroyed

EThere are many things we can do to protect the endangered wild animals

FThe oil is popular because it has a high melting point and contains healthy fats

GIt eats the sugars from the waste and turns it into thick oil that has similar qualities to palm oil

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