更多"The underwater listening system was"的相关试题:
[单项选择]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
[单项选择]The deep-sea listening system makes use of ______
A. the sophisticated technology of focusing sounds under water
B. the capability of sound to travel at high speed
C. the unique property of layers of ocean water in transmitting sound
D. low-frequency sounds traveling across different layers of water
[单项选择]The safety factor is primary in all underwater operations.
A. perfect
B. the full view
C. maximum
D. principal
[单项选择]The research team decided to use an underwater saw to cut the ______ship into sections before lifting it up.
A. electrical
B. electric
C. electricity
D. electrifying
[单项选择]Why did the U.S. Navy set up underwater microphones around the world in the 1960s
A. To listen for changes in ocean structure.
B. To listen for changes of ocean currents or volcanic activity.
C. To make sure whether there was a giant squid deep in the ocean.
D. To follow the track of the Soviet warships under water.
