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The collision event is an indicator of the tension between the two Middle East countries.
A:sign
B:signal
C:symbol
D:predicament
B:signal
C:symbol
D:predicament
参考答案
参考解析
解析：indicator：指示器，显示器，这里可引申为某种信号。题干意思为：冲突事件是这两个中东国家局势紧张的一个信号。sign：符号，记号，迹象; signal：信号，暗号；symbol: 象征，表征; predicament：困境，窘境。经过分析，B选项最为切合题意。
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