单项选择题

The underwater listening system was originally designed

A．to trace and locate enemy vessels
B．to monitor deep-sea volcanic eruptions
C．to study the movement of ocean currents
D．to replace the global radio communications network

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热门试题

单项选择题

According to the passage people who have experienced ups and downs may become ______.

A．nervous when faced with difficulties
B．physically and mentally strained
C．more capable of coping with adversity
D．indifferent toward what happens to them

单项选择题

The score of the Holmes-Rahe test shows ______.

A．how much pressure you are under
B．how positive events can change your life
C．how stressful a major event can be
D．how you can deal with life-changing events