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

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

.A ________may be given ____means of flags, lights, and guns.

A.sign; by

B.signal; in

C.signal; by

D.sign; in

试题答案

C