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外语
A tourist is prevented from entering a country if he does not have ______ passport.
A tourist is prevented from entering a country if he does not have ______ passport.
admin
2011-05-29
67
问题
A tourist is prevented from entering a country if he does not have ______ passport.
选项
A、an operative
B、a valid
C、an efficient
D、an effective
答案
B
解析
valid意为“(法律上)有效的”,符合题意。operative意为“生效的,开始运转的”;efficient意为“有效率的,效率高的”;effective意为“奏效的”,往往强调具有产生实际或特定效果的能力。
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0
考博英语
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