.A may be given means of flags, lights, and guns.A. sign; byB. signal; inC. signal; byD. s

发布时间：2020-08-16 12:48:56

.A     may be given     means of flags, lights, and guns.
A. sign; by
B. signal; in
C. signal; by
D. sign; in

网友回答

A. sign; by
B. signal; in
(答案→)C. signal; by
D. sign; in
解析：考查词义辨析。sign 符号，signal 信号，短语：by means of 以什么样的方式，句意：信号可以以红旗，灯光和发枪的形式给出。所以选C。
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