— Why are you late again? — Sorry, I got stuck in the traffic jam. Some roads are blocked because they are _____ construction. |
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A. under B. during C. with D. at |
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你能帮帮他们吗
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按要求写词语。 1.仿写:爱憎(含反义词) ________
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若(ax的平方-x分之1)的9次方的展开式中各项系数之和等于1,则a=?
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