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The defense system will ______ if no proper identifying signal is given.A、mainta
The defense system will ______ if no proper identifying signal is given.A、mainta
游客
2023-11-21
21
管理
问题
The defense system will ______ if no proper identifying signal is given.
选项
A、maintain
B、compact
C、condense
D、activate
答案
D
解析
此题考查动词词义。A项maintain“保持;维持”为一个及物动词,因为在本句中无宾语,句意不完整,因此应首先排除。B项com pact“变得坚实”和C项condense“压缩;凝聚”都不合题意。D项 activate在此作不及物动词,意为“激活;开始起动”,符合题意。
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