It is implied in the text that
A. the toll of death and destruction is an astronomical figure.
B. the present system generates numerous false alarms.
C. material damage has been taken into account.
D. tsunamis leave people a chance of narrow escape.
查看答案
The term "diversify"(Line 8, Paragraph 3) most probably denotes
A. He laughs best who laughs last.
B. Do not put all your eggs into one basket.
C. It is implausible to gain from exclusive investment.
D. h is pointless to try to make repeated investment.
The best title of the text might be______.
A. The Laser: A Scientific and Technological Wonder
B. The Laser: A Powerful Tool for Communications
C. The Laser: A Solution to Life-Saving Problems
D. The Laser: A Multimillion Dollar Invention
Professional car thieves are interested in dust-free American cars because______.
A. they have enough time to dispose of the stolen cars
B. they have a special interest in American cars
C. American cars are popular among the dealers
D. American cars are usually new and expensive
A．if onlyB．only ifC．only thatD．only not
A. if only
B. only if
C. only that
D. only not
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