It has been announced that students _______ remain in their seats until all the papers have been col

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• 如果,那么A=（）-八年级数学
• 分式的基本性质：分式的分子、分母同乘（或除以）同一个（），分式的值不变，分式的符号法则：分式的分子、分母及分式本身，三者的符号改变其中（）分式的值不变。-八年级数学
• （m≠0）[]-八年级数学
• Hannah ________me; otherwise, other students wouldn't have known my result of the quiz.[ ]A. ma
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• --Mary I smoke here?-- If you , choose a seat in the smoking section.[ ]A．shouldB．couldC．mustD．may-高
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• — Did you tell Rose about the test? — Oh, no, I forgot. Icall her now.[ ]A. will B. can C. shouldD.
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• 下面的计算正确的是（）A．8a2÷b22=4a2b2B．（a-b）÷1(a-b)2×（a-b）2=a-bC．（a-b）÷1(a-b)2×（a-b）2=（a-b）5D．15a2÷3ab=5ab-数学
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