What did the aircraft carrier sail towards volatile waters for？
A. To carry out military exercises with South Korea.
B. To participate in the war.
C. To carry out military exercises with Japan.
D. To take part in a military show.
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家由乡镇企业改组而成的上市公司。中共中央、国务院授予他改革先锋称号，称他是“()的先行者”。
Which of the following descriptions is INCORRECT？
A limit of 120 decibels means an end to important industrial and scientific research.
B. Scientists know clearly what kinds of noises are harmful to ocean animals.
C. Many scientists suspected that noise is more dangerous than they expected.
D. Scientists couldn"t reach agreements in some aspects.
A team of American and Canadian scientists discovered that
A. underwater explosions caused whales" losing of their hearing.
B. some of the whales died as a result of seawater pollution.
C. only whales could stand the noise caused by explosions.
D. whales" ears bled and became infected as a result of unknown illness.
The noise that affects sea creatures conies from the following EXCEPT
A. industrial underwater explosions.
B. ocean drilling.
C. bathing beach.
D. ship engines.
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