[填空题]Control rods in a nuclear reactor are used to control the amount of energy generated in a nuclear reactor. They can also be used to shut the reactor or to change the fuel.

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[单项选择]The nuclear polyhedrosis virus helps control gypsy moth populations by killing the moth’s larvae. The virus is always present in the larvae, but only every sixth or seventh year does the virus seriously decimate the number of larvae, thereby drastically setting back the gypsy moth population. Scientists believe that the virus, ordinarily latent, is triggered only when the larvae experience biological stress.
If the scientists mentioned above are correct, it can be inferred that the decimation of gypsy moth larvae populations by the nuclear polyhedrosis virus would be most likely to be triggered by which of the following conditions
A. A shift from drought conditions to normal precipitation in areas infested by gypsy moths.
B. The escalating stress of defoliation sustained by trees at tacked by gypsy moths for the second consecutive year.
C. Predation on larvae of all kinds by parasitic wasps and flies.
D. Starvation of the gypsy moth larvae as a result of overpopulation.
E. (E) Spraying of areas infested by gypsy moths with laboratory-raised nuclear polyhedrosis virus.

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[填空题]The first nuclear reactor to provide electricity to a national grid opened in England in ______.

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[填空题]Uranium has to be enriched if a nuclear reactor is built.

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[填空题]The Bush Administration appears determined to continue the war on drugs that has been actively (36) by all U. S governments since the Nixon Administration.
Defenders of the war on drugs often throw in an economic (37) . It has been (38) because it curtails (消减) use by raising street prices. It does this because suppliers have to be compensated for the risk of imprisonment and other punishments. It may be true that high prices have (39) the demand for drugs, but the fact remains that most illegal drugs remain popular and (40) , regardless of price. More important, any (41) in the number of addicts and other users has come with an enormous price label. The U. S alone spends almost $ 40 billion annually waging the drug war, and other countries also spend big sums.
The war is fought by seizing and destroying drugs and by apprehending and imprisoning suppliers. A (42) fact is that the U. S imprisons a l

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[单项选择]Passage Three

As the global village continues to shrink and cultures collide, it is essential for all of us to become more sensitive, more aware of, and more observant to the body language (motions/gestures) that surround us each day. And as many of us cross over cultural borders, it would be fitting for us to respect, learn, and understand more about the effective and powerful "silent language" of gestures. Without gestures, our world would be static and colorless. The social anthropologists, Edward T. Hall claims 60 percent of all our communication is nonverbal. In that case, how can we possibly communicate with one another without gestures
The world is a giddy montage (蒙太奇) of vivid gestures—the ones used by traffic police, street vendors, expressway drivers, teachers, children on playground and athletes with their exuberant (热情洋溢的) hu
A. Body language is static and colorless.
B. Body language can be very amusing.
C. Body language is universal therefore the interpretations of it are always identical.
D. No one can communicate without body language.

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