23.Paragraph 1 _______________
24.Paragraph 2 _______________
25.Paragraph 3 _______________
26.Paragraph 4 _______________
A.Strong Reactions
B.Anxiety about the future of Cloning
C.The Right Choose
D.What Is Cloning?
E.Arguments in Favor of Cloning
F.A Common Sight
27.Richard Seed claimed to be allele to clone _______________
28.Richard Seed's announcement received _______________
29.The United States will introduce _______________
30.Within ten years scientists will probably have _______________
A.the nucleus of a cell www.lexue88.com
B.cloned human beings
C.a human being in two years
D.a law to ban human cloning
E.a report on human cloning
F.heavy media coverage
第4部分：阅读理解(第31～45题，每题3分，共45分)
下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每道题确定一个最佳选项。
第一篇
Walking Robot Carries a Person
The first walking robot capable of carrying a person unveiled on Friday in Tokyo, Japan. Its creators at Waseda University in Tokyo and the Japanese robotics company Tmsuk hope their two-legged creation will one day enable wheel-chair users to climb up and down stairs and assist the movement of heavy goods over uneven terrain.
The battery-powered robot, code-named WL-16, is essentially an aluminum chair mounted on two sets of telescopic poles. The poles are bolted to flat plates which act as feet. WL-6 uses 12 actuators to move forwards, backwards and sideways while carrying an adult weighing up to 60 kilograms(130 pounds). The robot can adjust its posture and walk smoothly even if the person it is carrying shifts in the chair. At present it can only step up or down a few mil1imeters, but the team plans to make it capable of dea1ing with a normal flight of stairs.
"I believe this bipedal robot, which I prefer to call a two-legged walking chair rather than a wheel-chair, will eventually enable people to go up and down the stairs," said Atsuo Takanishi, from Waseda University
"We have had strong robots for some time but usually they have been manipulators, they have not been geared to carrying people around," says Ron Arkin, at the Georgia Institute of Technology and robotics consultant for Sony. "But I don't know how safe and how user-friendly WL- 16 is."
Tmsuk chief executive Yoichi Takamoto argues that bipedal or multi-legged robots will be more useful than so-called "caterpillar models" for moving over uneven ground.
WL- 16's normal walking stride measures 30 centimeters, but it can stretch its legs to 136 cm apart. The prototype is currently radio-controlled, but the research team plans to equip it with a stick-like controller for the user in future", Takanishi said, it wi1l take "at least two years" to develop the WL- 16 prototype into a working model.
Smaller, ground-hugging robots have been developed to pass across tricky terrain. One maggot-like device uses a magnetic fluid to pulse its way along", while another snake-like robot uses smart software to devise new movement strategies if the landscape takes its toll on any one part. One ball-shaped robot even uses a leap-and-bounce approach to travel over bumpy territory.
But none of these are big or strong enough to carry a person too.
31.The robot that unveiled on Friday in Tokyo, Japan
A.has two legs and is able to carry a person.
B.surprised visitors from Waseda University.
C.enables wheel-chair users to climb up and down stairs.
D.can transport heavy goods over uneven terrain.
32.Which of the following about how the robot works is NOT correct?
A.The robot is battery-powered.
B.The robot has two sets of poles mounted on flat plates.
C.The robot uses actuators to move about.
D.The robot can cap an adult of up to 60 kilograms.
33.What does Ron Arkin think of WL-l6?
A.He thinks the robot is user-friendly.
B.He thinks it i8 another kind of manipulator.
C.He is not sure if the robot can cap people safely
D.He doubts if the robot is strong enough to climb stairs.
34.Which of the following description about WL-l6 is true?
A.It is a ground-hugging robot.
B.It is a caterpillar model.
C.It needs time to be developed into a working model.
D.It is going to be radio-controlled.
35.What is the main idea of the last paragraph?
A.Different shapes of robots perform different functions.
B.Many kinds of robots have been developed to walk over tricky terrain.
C.Robots, big or small, perform almost the same function.
D.None of the four kinds of robots are strong enough to carry people around.
第二篇
Night of the Living Ants
When an ant dies, other ants move the dead insect out of the nest. This behavior is interesting to scientists, who wonder how ants know for sure - and so soon-that another ant is dead.
Dong-Hwan Choe, a scientist at the University of California found that Argentine ants have a chemical on the outside of their bodies that signals to other ants, "I'm dead - take me away."
But there's a twist to Choe's discovery. These ants are a little bit like zombies. Choe says that the living ants - not just the dead ones - have this death chemical. In other words, while an ant crawls around, perhaps in a picnic or home, it's telling other ants that it's dead.
What keeps ants from hauling away the living dead? Choe found that Argentine ants have two additional chemicals on their bodies, and these tell nearby ants something like, "wait -I'm not dead yet. "So Choe's research turned up two sets of chemical signals in ants: one says, "I'm dead," the other set says, "I'm not dead yet."
Other scientists have tried to figure out how ants know when another ant is dead. If an ant is knocked unconscious, other ants leave it alone until it wakes up. That means ants know that unmoving ants can still be alive. www.lexue88.com
Choe suspects that when an Argentine ant dies, the chemical that says "Wait - I'm not dead yet" quickly goes away. Once that chemical is gone, only the one that says "I'm dead" is left." It's because the dead ant no longer smells like a living ant that it gets carded to the graveyard, not because its body releases new unique chemicals after death," said Choe. When other ants detect the "dead" chemical without the "not dead yet" chemical, they haul away the body. This was Choe's hypothesis.
To test his hypothesis, Choe and his team put different chemicals on Argentine ant pupae. When the scientists used the "I'm dead" chemical, other ants quickly hauled the treated pupae7 away. When the scientists used the "Wait - I'm not dead yet" chemicals, other ants left the treated pupae alone. Choe believes this behavior shows that the "not dead yet" chemicals override the "dead" chemical when picked up by adult ants. And that when an ant dies, the "not dead yet" chemicals fade away. Other nearby ants then detect the remaining "dead" chemical and remove the body from the nest.
36.What is meant by "death chemical" mentioned in paragraph 3?
A.A chemical that contains poison.
B.A chemical that causes death.
C.A chemical that announces death.
D.A chemical that prevents death.
37.Which of the following is closest in meaning to the question "What keeps ants from hauling away the living dead? (paragraph 4)"?
A.How do ants know what is to be hauled away from the dead ants?
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