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单选题
_____
A
signals
B
symbols
C
represents
D
shows
参考答案
参考解析
解析：
词义辨析题。句意：红灯向车辆和行人发出停车或停步的信号。signal (to) sb. to do sth.向某人发出做某事的信号。symbol象征。represent代表；表现。show证明；表明。
词义辨析题。句意：红灯向车辆和行人发出停车或停步的信号。signal (to) sb. to do sth.向某人发出做某事的信号。symbol象征。represent代表；表现。show证明；表明。
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