问题
单项选择题
General radio communications in the global system may（）ship’s safety.
A.be responsible for
B.have an impact on
C.command
D.give a guidance to
答案
参考答案：B
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General radio communications in the global system may（）ship’s safety.
A.be responsible for
B.have an impact on
C.command
D.give a guidance to
参考答案：B