|
|
|
| www.eduxue.com 来源：不详 更新时间：2005-3-29 【字体：小 大】 |
推荐文章：2005年1月四级考A卷答案
推荐文章简介：
PartⅠ Listening Comprehension 1.D) The man used to own a car 2.A) Tony should continue taking the course. 3.A) She has to study for the exam. 4.C) They will continue to exist al
ustion after the long plane ride.
D) They weren’t accustomed to the change in weather.
27. The author had to conduct the two women’s funerals probably because ________.
A) he had great sympathy for the deceased
B) he wanted to console the two families
C) he was priest of the local church
D) he was an official from the community
28. People feel guilty for the deaths of their loved ones because ________
A) they believe that they were responsible
B) they had neglected the natural course of events
C) they couldn’t find a better way to express their grief
D) they didn’t know things often turn out in the opposite direction
29. In the context of the passage, "... the world makes sense" (Line 2, Para, 4) probably means that ________.
A) we have to be sensible in order to understand the world
B) everything in the world is predetermined
C) there’s an explanation for everything in the world
D) the world can be interpreted in different ways
30. People have been made to believe since infancy that ________.
A) every story should have a happy ending
B) their wishes are the cause of everything that happens
C) life and death is an unsolved mystery
D) everybody is at their command
Passage THREE
Questions 31 to 35 are based on the following passage.
"I’ve never met a human worth cloning," says cloning expert Mark Westhusin from his lab at Texas A&M University. "It’s a stupid endeavor." That’s an interesting choice of adjective, coming from a man who has spent millions of dollars trying to clone a 13-year-old dog named Missy. So far, he and his team have not succeeded, though they have cloned two cows and expect to clone a cat soon. They just might succeed in cloning Missy this spring - or perhaps not for another 5 years. It seems the reproductive system of man’s best friend is one of the mysteries of modern science.
Westhusin’s experience with cloning animals leaves him upset by all this talk of human cloning. In three years of work on the Missy project, using hundreds upon hundreds of dog’s eggs, the A&M team has produced only a dozen or so embryos (胚胎) carrying Missy’s DNA. None have survived the transfer to a surrogate (代孕的) mother. The wastage of eggs and the many spontaneously aborted fetuses (胎) may be acceptable when you’re dealing with cats or bulls, he argues, but not with humans. "Cloning is incredibly inefficient, and also dangerous," he says.
Even so, dog cloning is a commercial opportunity, with a nice research payoff. Ever since Dolly the sheep was cloned in 1997, Westhusin’s phone has been ringing with people calling in hopes of duplicating their cats and dogs, cattle and horses. "A lot of people want to clone pets, especially if the price is right," says Westhusin. Cost is no obstacle for Missy’s mysterious billionaire owner; he’s put up $3.7 million so far to fund A&M’s research.
Contrary to some media reports, Missy is not dead. The owner wants a twin to carry on Missy’s fine qualities after she does die. The prototype is, by all accounts, athletic, good-natured and supersmart. Missy’s master does not expect an exact copy of her. He knows her clone may not have her temperament. In a statement of purpose, Missy’s owner and the A&M team say they are "both looking forward to studying the ways that her clones differ from Missy."
Besides cloning a great dog, the project may contribute insight into the old question of nature vs. nurture. It could also lead to the cloning of special rescue dogs and many endangered animals.
However, Westhusin is cautious about his work. He knows that even if he gets a dog pregnant, the offspring, should they survive, will face the problems shown at birth by other cloned animals: abnormalities like immature lungs and heart and weight problems~ "Why would you ever want to clone humans," Westhusin asks, "when we’re not even close to getting it worked out in animals yet?"
31. By "stupid endeavor" (Line 2, Para. 1), Westhusin means to say that ________.
A) human cloning is a foolish undertaking
B) animal cloning is absolutely impractical
C) human cloning should be done selectively
D) animal cloning is not worth the effort at all
32. What does&上一页 [1] [2] [3] [4] [5] [6] [7] [8] 下一页 |
| 关于〖2005年1月8日英语六级试题B卷〗的最新评论： |
|
|
|
