单项选择题

Which of the following is true about the U.S. Navy underwater listening network.

A．It is now partly accessible to civilian scientists.
B．It has been replaced by a more advanced system.
C．It became useless to the military after the cold war.
D．It is indispensable in protecting endangered species.
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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 d 'civilian use
单项选择题
By saying While it's true that.., be they scientific or artistic. (Para. 5), the author means that______
A．business management should be included in educational programs
B．human -wisdom has accumulated at an extraordinarily high speed
C．human intellectual development has reached new heights
D．the importance of a broad education should not be overlooked
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