已知a＜0，则等于[]A、-2aB、2aC、4aD、-4a-八年级数学

更多内容推荐

• E-mail , as well as cellphones, _____an important part in daily communication.A．have playedB．playC．a
• 计算：-八年级数学
• ---It was Sunday today, and I _______ up very early. ---So you really had a good rest.A．didn’t need
• 下列计算正确的是[]A．B．（a+b）2=a2+b2C．（﹣2a）3=﹣6a3D．﹣（x﹣2）=2﹣x-九年级数学
• 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
• Their wages ____by a full third in the past two years.A had gone down B would go downC have gone dow
• In a word, I don’t think what you said____sense at all.A．makeB．makesC．is makingD．has made-高二英语
• By the time he arrived in Beijing, we _______ there for two days.A．will have stayedB．stayC．have been
• 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
• ---I have got a headache．----No wonder ．You _______in front of that computer too long ．A．work B．are
• 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
• ―Iguessyouwereinahurry.Look! You_______ yoursweaterinsideout.A．hadwornB．woreC．arewearingD．werewearin
• 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
• —It is the first time that I ________ here in Hong Kong.—What great changes！It’s ten years since I _
• 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
• The father as well as his daughters _____ skating on the freezing river every Sunday afternoon.A．goB
• Have you nearly finished? Time_______.A．is run outB．has been run outC．is running outD．has run out of
• 当1＜x＜3时，化简的结果是[]A、4-2xB、2C、2x-4D、4-八年级数学
• —The windows are dirty.—I know. They _________ for weeks.A．haven’t cleanedB．didn’t cleanC．weren’t cl
• 化简：+（5-）=（）。-九年级数学
• — I’m really glad to see you back.. ______ your trip to the valley interesting?— No. it ______ very
• Having been walking for nearly an hour , I ______ a good sleep in bed . A．am dying forB．am dying toC
• —I counted sheep, I drank milk and I tried everything, but nothing helped.—It seems you _____ too mu
• 计算：。-八年级数学
• 计算下列各题：（1）+=（）；（2）=（）；（3）=（）；（4）+|﹣2|﹣÷（﹣）×=（）。-八年级数学
• 计算：（1）=（）；（2）=（）。-八年级数学
• I feel sorry for myself .If Imore efforts to my studies , I wouldn’t be doing a job with such low wa
• （1）解下列不等式（组），并把解集在数轴上表示出来：①2x-2≤1+x；②；（2）计算：；（3）求x的值：4（x+1）2=81。-八年级数学
• 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