Mark _____ havehurried. After driving at top speed, he arrived half an hour early.[ ]A. needn't

更多内容推荐

• 计算：a3x2•-x3a2=______．-数学
• — Did you tell Rose about the test? — Oh, no, I forgot. Icall her now.[ ]A. will B. can C. shouldD.
• — I had to take a taxi home yesterday because my car broke down.— You ____. I was not using it.[ ]A.
• 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
• 化简a4-a2b2(a-b)2÷a(a+b)b2•b2a的结果是______．-数学
• — The contest is so easy, but you fail to pass it.— I'm sorry it ______ be this way. [ ]A. need
• — Good morning. I've got an appointment with Miss Smith in the Personnel Department. — Ah, good
• How disappointing it was that I _____ the wonderful football match. [ ]A. may have missedB. should h
• 计算：（1）6a8y•2y23a2=______；（2）x+1y÷x2-1y2=______．-数学
• 计算3xy24z2•(-8z2y)等于（）A．6xyzB．-6xyC．-3xy2-8z34yzD．6x2yz-数学
• （1）化简：x2-9x2+6x+9•12x-6（2）解方程：7x-2=5x．-数学
• Doctors say that exercise is important for health, but it _____ be regular exercise. [ ]A. can B. wi
• 化简2x+2y5a2b•10ab2x2-y2的结果为______．-数学
• 下列运算，结果正确的是（）A．1a+1b=1a+bB．2a+1a+1=2C．a÷1a=aD．a+1a2-1=1a-1-数学
• 计算：（1）a2a+3•a2-96a；（2）2mm2-4+mm+2．-数学
• 计算：1x2-4x+4•x2-4x=______．-数学
• —Lucy doesn't mind lending you her dictionary.— She _____. I have already borrowed one. [ ]A. c
• My newly-purchased magazine is nowhere to be found. ____ I left it on the train? [ ]A. Must B. Shoul
• It is required by the rules that students______ get grades not lower than 85％in any subject inorder
• — I ______ have turned on the air conditioner at such a low temperature.— No wonder you've got
• 计算：（1）35×85=______；（2）(-59)×(-310)=______；（3）25÷(-23)______；（4）(-38)÷27=______．-数学
• — I left my handbagon the train, but luckily someone gave itto a railway official.— How unbelievable
• （-b2a）2n的值是（）A．b2+2na2nB．-b2n+2a2nC．b4na2nD．-b4na2n-数学
• 计算题（1）a2-4a2+2a-8÷（a2-4）•a2-4a+4a-2；（2）x2-1x2-4x+4÷（x+1）•x2-3x+2x-1-数学
• Researchfindingsshowwespendabouttwohoursdreamingeverymight,nomatterwhatwe_________havedoneduringthed
• 分式乘以分式，用分子的积做______，分母的积做______；分式除以分式，把除式的分子、分母______后，与被除式______．-数学
• 计算：3a22b•4b9a=______．-数学
• 化简：（1）(xy-y2)÷x2-2xy+y2xy•x-yx2；（2）a-1a-2÷a2-2a+12a-4．-数学
• You ____say these words. That has hurt her heart.[ ]A. can'tB. won'tC. oughtn't toD.
• Your room is terribly dirty; you _____ get it cleaned in two hours, or Mum will be angry. [ ]A. canB
• 计算：（1）x2+xx-1•x+1x3+2x2+x（2）x2-4y2x2+2xy+y2÷x+2yx2+xy．-数学
• 计算：(-12a)÷(2ab)2×3b2a2÷(-2a2b)3．-数学
• 化简：a÷ab•1a的结果是（）A．1B．baC．abD．ab-数学
• If you _____smoke, please go outside.[ ]A. can B. shouldC. mustD. may-高一英语
• — _____ you always question everything I say? — Sorry if I make you unhappy, but it's my habit
• 计算a-ba×(bb-a)2÷b2a2．-数学
• 化简5x+5y3a2b•6a3b2x2-y2=______．-数学
• — Was the bungee jumper killed since the line broke after he jumped off the bridge?— Well, it's
• 计算：（xy-x2）•xyx-y=______．-数学
• — What sort of car do you want to have?An expensive one?— Well,it _____ be expensive-that's not
• It's quite warm here; we __________turn the heating on yet.[ ]A. couldn't B. mustn'tC
• Students ______ remain in their seats until all the exam papers have been collected.[ ]A. would B. s
• 计算3b2a•(-a6b)的结果为（）A．-b2B．b2C．b4aD．-b4a-数学
• He _____ have completed his homework; otherwise, he would have been plying football with others. [ ]
• — Youjustthinkofyourself!Youkeptmewaitingforaboutthreehours. — Iamsorrythatyou_____thinkso. [ ]A.wou
• 下列各式（1）（a+b）÷（a+b）•1a+b=a+b；（2）8a2b3÷（-3a4b2）=-6a3b；（3）m22n•（-1mn）=m22n2；（4）（-ab）•(-ab)2÷(-ab)3=a2b2
• 化简xx+1÷x2x2-1的结果是______．-数学
• Perhaps you _____stop playing computer games now. Your boss may be turning up in the office at any m
• 已知x=2，则代数式(x2+2x-39-x2)3•(-x-31-x)2的值为______．-数学
• 计算：x2+xyx2-xy÷(x-y)•x2-xyxy．-数学