单项选择题

The passage is chiefly about______.

A．an effort to protect an endangered marine species
B．the civilian use of a military detection system
C．the exposure of a U.S. Navy top-secret weapon
D．a new way to look into the behavior of blue whales
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单项选择题
It can be inferred from the passage that______.
A．new radio devices should be developed for tracking the endangered blue whales
B．blue whales are no longer endangered with the use of the new listening system
C．opinions differ as to whether civilian scientists should be allowed to use military technology
D．military technology has great potential in civilian use
单项选择题
If the assumption about the delay of a new Ice Age is correct,
A．the best way to overcome the cooling effect would be to burn more fuels
B．ice would soon cover the northern hemisphere
C．the increased levels of carbon dioxide in the atmosphere could warm up the earth even more quickly
D．the greenhouse effect could work to the advantage of the earth
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