搜题
王老师:19139051760(拨打)
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第1题

The manager said that there were two reasons ______ our sales dropped sharply last year. A.because B.since C.why D.
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第2题

选定所有文本，可以用组合键（ ）。
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第3题

一个事务中对数据库的所有操作是一个不可分割的操作序列，这个性质称为事务的___ ___ _。
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第4题

____ the look on his face, he doesn’t quite understand what the speaker is saying. A.Judge by B.Judging by C.To judg
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