The passage is chiefly about ______. The underwater listening system was originally designed ______.

admin2009-05-24  23

问题 The passage is chiefly about ______.
The underwater listening system was originally designed ______.

选项 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

答案A

解析 主要依据在第三段第二行、第三行的相关内容。
转载请注明原文地址:https://jikaoti.com/ti/vOpjFFFM
0

最新回复(0)