题目内容
【题目】照顾好你的身体是非常有道理 (明智) 的。
【答案】见解析
【解析】It makes good sense to take good care of your health.
【题目】他既然已经退休，那如何打发日子呢？
How does he __________ himself __________ he's retired?
【题目】对于……的贡献
【题目】She suggested that we should go for his help.
__________ __________ is that we __________ for his help.
【题目】—Sorry, I made a mistake again.
—______. Practice more and you’ll succeed.
A. Never mind B. Certainly not
C. Not at all D. Don’t mention it
【题目】Jack, look! Everybody is doing homework quietly. ______ you make a noise in class?
A. Could B. Shall C. Will D. Must
【题目】说谎话来掩盖我的错误是我最不愿意干的事。
To invite a lie about my mistakes is ____________________ thing I'll do.
【题目】A lamb was offered as a__________ (祭品).
【题目】
Of all the reasons, cloning for medical purposes has the most potential to benefit large numbers of people. How might cloning be used in medicine?
Much of what researchers learn about human disease comes from studying animal models such as mice. Often, animal models are genetically engineered to carry disease-causing mutations (变异) in their genes. Creating these transgenic animals is a time-intensive process that requires trial-and-error and several generations of breeding. Cloning technologies might reduce the time needed to make a transgenic animal model, and the result would be a population of genetically identical animals for study.
Stem cells are the body's building blocks, responsible for developing, maintaining and repairing the body throughout life. As a result, they might be used to repair damaged or diseased organs and tissues. Researchers are currently looking toward cloning as a way to create genetically defined human stem cells for research and medical purposes. To see how this is done, see Creating Stem Cells for Research, a component of the Stem Cells in the Spotlight module.
Farm animals such as cows, sheep and goats are currently being genetically engineered to produce drugs or proteins that are useful in medicine. Just like creating animal models of disease, cloning might be a faster way to produce large herds of genetically engineered animals. Find out more about this research in the feature article Pharming for Farmaceuticals.
Have you seen Jurassic Park? In this feature film, scientists use DNA preserved for tens of millions of years to clone dinosaurs. They find trouble, however, when they realize that the cloned creatures are smarter and fiercer than expected.
In reality? Probably not. It's not likely that dinosaur DNA could survive undamaged for such a long time. However, scientists have tried to clone species that became extinct more recently, using DNA from well-preserved tissue samples.
To clone or not to clone: that is the question. The prospect of cloning humans is highly controversial and raises a number of ethical, legal and social challenges that need to be considered.
【1】 Of all the reason of cloning, which do people think is the most benefit to people?
A. Medicine purpose. B. protecting endangered animal
C. Cloning for some families. D. Purifying human beings
【2】 By the passage we can infer that the side effect people would research human disease using animal models is __________.
A. the sample is not the same with human
B. the sample has less function than human
C. the sample often carries disease in the genes
D. the results can't adapt to human
【3】 What function do stem cells play in body?
A. Breeding. B. Repairing. C. Replacing. D. Reproducing.
【4】 According to the passage, which statement of the following is not right?
A. Cloning animals have achieved now.
B. By cloning people can cure some deadly diseases.
C. Dinosaurs in the future film are smarter.
D. Cloning can bring human only happiness.
【5】 The title of this passage probably is __________.
A. Why clone? B. The benefit of cloning.
C. Cloned animals. D. Cloning in the future.
