题目内容
.A ________may be given ____means of flags, lights, and guns.
|
A.sign; by |
B.signal; in |
C.signal; by |
D.sign; in |
【答案】
C
【解析】略
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题目内容
.A ________may be given ____means of flags, lights, and guns.
|
A.sign; by |
B.signal; in |
C.signal; by |
D.sign; in |
C
【解析】略