单项选择题


A．practice
B．proof
C．show
D．comparison
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单项选择题
A．signB．signalC．symbolD．mark
A．sign
B．signal
C．symbol
D．mark
单项选择题
The author believes that the only way to abolish war is to ______.
A．abolish nuclear weapons
B．let the stronger side take over the world
C．improve bacteriological and chemical weapons
D．settle international issues through negotiation
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