E-mail , as well as cellphones, _____an important part in daily communication.A．have playedB．playC．a

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• 计算：-八年级数学
• 计算：（1）；（2）；（3）已知2x-y的平方根为±4，-2是y的立方根，求-2xy的平方根。-八年级数学
• – May I go to the movies tonight, mum? -- You can when you ____ your homework.A．will finishB．are fin
• 计算的结果是[]A.-B.C.D.-九年级数学
• 化简：-八年级数学
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• In a word, I don’t think what you said____sense at all.A．makeB．makesC．is makingD．has made-高二英语
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• 化简：。-八年级数学
• This kind of storiesinstructive while stories of that kindharmful to children.A．is; seemsB．are; seem
• It was the third time that Jack ______ to China.A．has comeB．has , cameC．had cameD．had come-高二英语
• -九年级数学
• 计算：（1）；（2）。-八年级数学
• I know a little bit about the city as I __________ there for one year in my youth.A．am studyingB．had
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• He _______ in a university for five years, but now he runs a company of his own.A．has taughtB．had ta
• 计算：2-=[]A.5B.3C.-3D.-1-九年级数学
• 计算：-八年级数学
• A library with five thousand books ____________ to the nation as a gift.A．have offeredB．are offeredC
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• 计算：-八年级数学
• （1）计算：；（2）求x的值：3（x-1）3+24=0。-八年级数学
• 计算：。-八年级数学
• 计算：（1）；（2）。-八年级数学
• 计算：=（）。-八年级数学
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• 计算-八年级数学
• 下列各运算中，错误的个数是30+3-1=-3；②；③（2a2）3=8a5；④-a8÷a4=-a4[]A、1B、2C、3D、4-九年级数学
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• 当1＜x＜3时，化简的结果是[]A、4-2xB、2C、2x-4D、4-八年级数学
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• 化简：+（5-）=（）。-九年级数学
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• 计算：。-八年级数学
• 计算下列各题：（1）+=（）；（2）=（）；（3）=（）；（4）+|﹣2|﹣÷（﹣）×=（）。-八年级数学
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• I feel sorry for myself .If Imore efforts to my studies , I wouldn’t be doing a job with such low wa
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• 计算：（1）；（2）。-九年级数学
• 计算：-九年级数学
• 计算：=（）。-九年级数学
• 下列计算正确的是[]A.B.C.D.-九年级数学
• 计算：-八年级数学
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• 下列运算正确的是[]A.B.（a2）3=a5C.2-3=-6D.-九年级数学