计算：35-25=______．-数学

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• -----Is this the first time you______ Chengdu?-----No. But the first time I______ here, the city was
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• ---Do you know the timetable of the school bus? ---Sure, the first trip________ at 6:30 a.m. and usu
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• 计算：220+45-25=______．-数学
• 计算：27-23+45-数学
• 计算（1）(π-2009)0+12+|3-2|（2）18-92-3+63+(3-2)0+(1-2)2-数学
• Prices____ all the time and no one knows when they stable.A．are going up; becomeB．have been going up
• By the end of last year, another new gymnasiumin Beijing.A．would be completedB．was being completedC．
• 计算：93+712-548+213．-数学
• According to the flight schedules, the plane for Karshgar ________ at 11 am.A．will leaveB．leavesC．ha
• 计算a3+a21a所得到的结果是______．-数学
• --- Haven’t seen you for ages! Where have you been, anywhere? --- I _______ to New York City. I jus
• 计算：320-45-15．-数学
• In the last few years thousands of films all over the word.A .have produced B. have been producedC.
• 计算：1224-683+46-2．-数学
• One of my friends asked me to help him with his lessons this weekend, and thus __ my plan. A．ruined
• —Why didn’t you come to the cinema with us last Saturday? —Oh，sorry．But Ithe film．A．seeB．sawC．have
• Every possible meansto prevent the air pollution, but the sky is not still clear.A．is usedB．are used
• A local radio station said that several eruptions _____ in the past twenty years.A．had been taken pl
• 化简：32-8+212．-数学
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• 下列运算（1）(-5)2=-5，（2）8+182=4+9，（3）32+23=55，（4）4-2=2．其中正确的个数是（）A．0B．1C．2D．3-数学
• --Why does the river smell terrible?--Because large quantities of water__________.A．have polluted B．
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• 计算：2a3-a2a+a8a-数学
• 计算：52-（18-12）-数学
• 计算：323+182-505．-数学
• — Watch out! The petrol __. — Oh, my God. We have to find a service station soon enough.A．runs outB．
• 24+23-36．-数学
• The three of us ________ around Europe for about a month last summer.A．have travelledB．had travelle
• 计算12-3的结果为______；方程x（x-1）=x的解为______．-数学
• I'll go to the library as soon as I finish what I .A．was doingB．am doingC．have doneD．had been
• 计算147-75+27的值为（）A．911B．311C．33D．53-数学
• —Bob has gone to California.—Oh, can you tell me when he ?A．has leftB．leftC．is leavingD．would leave-
• ---Ring me at 7 a.m.?---No, not that early! I _________.A．sleepB．will sleepC．am sleepingD．will be sl
• 计算：（1）12-213-27；（2）(2-3)2+8÷3．-数学
• （0.5+213）-（18-27）-数学
• 化简：8-18+2．-数学
• Some minatory experts are sure that the army of that nation _________ with more modern and advanced
• 计算：1236x+6x4-2x1x．-数学
• 化简：①a2b-a2b+ab-a2b(a≥0，b＞0)②4x+22x-128x-4x(x≥0)-数学
• The Internet connection for the entire area _________ when there was a sudden power cut yesterday.A．
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• Crusoe found that nine savages seemed to be eating something which they ___ on the fire.A．have cooke