搜题
王老师:19139051760(拨打)
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第1题

His speech was warmly received. It was several minutes before the applause _______.　 (A) died down (B) died of (C)
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第2题

Mr. Zhang makes _____ a point to keep up with the latest development in his field.　 (A) this (B) that (C) it (
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第3题

In many countries now seat belts are _____ for the driver and front seat passengers at least.　 (A) necessary (B) in
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第4题

在数据库并发控制中，两个或更多的事务同时处于相互等待状态，称为（ ）。
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