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The number of books in the bookshop ______ (be) about 10,000 and most of them are about science.
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He is not only kind but also always helps others,doesn’t he
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下面加粗字意义和用法相同的一项是 [ ] A.公输盘为楚造云梯之械 必为有窃疾矣
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In today’s world many people seem to be hungry for money.
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将0.2mol硝酸银、0.4mol硝酸铜、0.6mol氯化钾溶于水,配成100mL溶液,用惰性电极电解一段时间后,若在一极析出0.3mol铜,此是在另一极上产生的气体体积(标准状况)为多少( )
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