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传染病的基本特征是A、有传染性、季节性、免疫性和病原体B、.....
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断路器切断载流电路是指触头分开。()..
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●在CPU中,(1) 不仅要保证指令的正确执行,还要能够处理异.....
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She started to work _____ a will .A.inB.againstC.withD.for..
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His time _____ entirely with his office work .A.is taken upB.is taken inC.is taken on..
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_____ the saying goes,practice makes perfect .A.SinceB.AsC.ForD.Like..
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