下列运算正确的是[]A.x2·x3=x6B.3-2=-6C.(x3)2=x5D.40=1-九年级数学

更多内容推荐

• (2013·湖北，30)An artist who was recently traveling on a ferry to the southern island discovered_______
• 计算：（x-1-y-1）÷（x-2-y-2）-xy（x+y）-1．-数学
• 计算（2005-3）0-|-2|+（13）-1=______．-数学
• There's a big difference between saying you'll do something anddoing it.A．actuallyB．freque
• Although Diane survived the car crash, her arms and legs were badly injured and ______, her car was
• Adam and Max hardly knew what to talk about: they had so little ________.A．in publicB．in returnC．in
• My parents lent me the money. ________, I couldn’t have afforded the trip.A．Therefore B．Meanwhile C．
• 计算：（π-3）0+18-2sin45°-（18）-1．-数学
• （x-5）0=1成立的条件是：______．-数学
• Gun control is a subject ________Americans have argued for a long time. A．of whichB．about whichC．wit
• (2013·福建，29)Mrs.Smith finds it hard to clear up the mess，as her children are always ________ wheneve
• （1）计算：5-(13)-1-(π-2)0（2）先化简，再求值：1+a1-a2+21-a，其中a=-12．-数学
• 计算：20060=______．-数学
• （-2）-2=______，（-0.00002009）0=______．-数学
• Do you think shopping online will ______ take the place of shopping in stores?A．especiallyB．finallyC
• Mary gave Jack so much help that he gave her some roses ______ for her kindnessA．in turnB．by turnsC．
• When Helen saw his tutor nod ________ to her, she calmed down and went on with her performance. A．en
• 计算：（1）32-82；（2）318-1232+718；（3）(π+1)0-12+|-3|-(2+3)(3-2)．-数学
• ______ the assignment said above, you have to write a 200-word composition on environment pollution
• 计算，使结果中只含正整数指数幂：（a-3b-2）-2•（a-1b3）-3=______．-数学
• —What made John wild _____ joy?—Being admitted to his dream university.A．withB．byC．atD．for-高三英语
• (2013·安徽，22)Before you pay a visit to a place of interest, look in your local library________a book
• （a-2b-1）-3•（2ab2）-2．-数学
• 已知a2-3a+1=0，求（1）a2+a-2（2）a4+a-4（3）a+a-1的值．-数学
• I shall take you back to Beijng as soon as you areto travel A good enough B enough good C well enoug
• Barack Obama was very happy when many supporters voted ________ him.A．onB．forC．againstD．at-高一英语
• His hard work paid______ when he got the result.A．backB．overC．offD．for-高二英语
• 下列计算正确的是（）A．20080=0B．(12)-2=-14C．（a-3）2=a9（a≠0）D．a2÷a-3=a5（a≠0）-数学
• —Have you ever seen two leaves that are exactly the same?—Never. Leaves differ ____ each other ____
• （-1）2+（12）-1-5÷（2008-2）0-数学
• The plan worked out well so that the majority voted ________it.A．in favor ofB．in light ofC．in honor
• Xiao Li didn’t come to our party. We all fell sorry __ him.A．except forB．exceptC．besidesD．without-英语
• 2-1=______．-数学
• 下列计算中，错误的是（）A．（-2）0=1B．2x-2=2x2C．3.2×10-3=0.0032D．（x2y-2）÷（x-1y3）=xy-数学
• I often thought of my childhood, I lived on a farm.A．whoB．whenC．whereD．which-高一英语
• What he said just now had little to do with the question _____ discussion. A onB in C under D at-高三
• While typing, Helen has a habit of stopping ______ to give her long and flowing hair a smooth.A．now
• 2sin45°-|-2|-(-2009)0+(13)-1+3tan30°．-数学
• ---Is there anything you’d like for dinner?---No, nothing ____. A．in placeB．in returnC．in particular
• 下列计算：①（-1）0=-1；②（-1）-1=1；③3a-3=-13a3；④（-x）5÷（-x）-3=-x-2．其中正确的个数是（）A．4B．3C．1D．0-数学
• Generally speaking，friends have_____in____each other.A．much；common withB．little；common toC．many；comm
• Do you approve of the idea that success can be measured ________ money alone?[ ]A. in case ofB. in t
• 3-2=______．-数学
• 计算并将结果化成只含正整指数幂的形式（x-3y-2）-3•（x2y-1）-4．-数学
• — How do you think of my composition?— Almost perfect ________ one spelling mistake.A．but B．exceptC．
• ---You don’t seem to be quite yourself today, do you? ---I’m suffering from a cold. Nothing serious,
• Jack has a good habit of keeping a diary every day;he is very good at writing.A．becauseB．asC．as a re
• 计算3-2的结果是（）A．-9B．-6C．-19D．19-数学
• 计算：（12）-1+（1-2）0．-数学
• The country has been ______ war with its neighbor for almost ten years.A．inB．onC．atD．during-高一英语