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The government has _____ itself to improving health education.A.committedB.doneC.madeD...
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数据并发操作通常会带来三类问题,它们是丢失更新、 【】 .....
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What he has done can be praised as a real _____.A.adventureB.ventureC.riskD.torture..
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Our teacher _____ a present yesterday, but he did not want to _____ it.A.accepted, re..
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If you have trouble, please _____ me by phone.A.contactB.contact withC.contact forD.con..
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发热的过程大致分为3期,即__、____、_____。..
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