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矿物的硬度主要决定于 ，这与化学键的类型及其强度密切相关。
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【简答题】用所给动词的正确时态填空。 1. Look! Some boys ______ (play) basketball over there. 2. We______ (play) s at four in the afternoon. 3. —Listen! Who ______ (sing) in English? —It's Lin Hai. He ______ (sing) very...
【简答题】设计、开发和优化产品
【简答题】用所给动词的正确时态填空 I _______(fly)a kite with my son in the park now .
【简答题】时态填空，阅读下面一篇短文，根据情景，用所给动词的正确时态填空。 Do you know sports lotteries(彩票)? Young people can get addicted(上瘾) to it, especially if they 小题1: ___ (win), they 小题2: __ __ (think) playing the lottery is the r...
【简答题】用所给动词的正确时态填空。 1.It takes about an hour _____(go) to Changzhou by bus. 2.He left home without _____(tell) his mother. 3.My sister seldom _____(play)volleyball now . 4.Look ! Lily's cat _____ (lie)on th...
【简答题】用所给动词的正确时态填空 They _______(talk)about the film now .
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