搜题
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第1题

one time, Manchester was the home of the most productive cotton mills in the world.
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第2题

British people don.t have to pay when they see their doctor. A、Right. B、Wrong. C、Doesn.t say.
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第3题

4、 Any solution for which the concentration is precisely known is called a standard solution.
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第4题

Before the first non-stop flight made in 1949, it ________ necessary for all planes to land for refueling. A.would be
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