bluehigher 幼苗
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Although he failed this time, he didn't give up and ________ studying hard.
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如图所示,有一个固定在水平桌面上的汽缸,内部密闭了质量为m的某种理想气体. (1)如果这种理想气体的摩尔质量为M,阿伏伽德罗常数为N,则汽缸中气体分子数:n=_______.
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Mrs. Smith has a bottle of medicine named 666 POWDER FOR COLD at home. Here is the instuction of it.
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Mr. Wood, _____________ students are here today. [ ]
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