下列运算正确的是[]A．a5+a5=a10B．a6×a4=a24C．a0÷a-1=aD．a4﹣a4=a0-七年级数学

更多内容推荐

• If a television or radio breaks the new rules, it is forbidden to screen advertisements and the offi
• —Why do you suggest we buy a new machine?—Because the old one has been damaged ________.[ ]A. beyond
• —Credit cards areuseful when traveling.—True. They save us the trouble of taking too much cash.A．par
• Our teacher wasn’t blaming anyone ; he _______ said errors like this could be avoided．A．nearlyB．most
• ----Do you play football after work ? ---Yes, ________ ． Playing football is not my favorite sport．A
• --What do you think of French? --In my opinion, French is _______ EnglishA．a subject so difficult as
• 计算：(12)-2+20110=______．-数学
• （x-1+y-1）-1=（）A．x=yB．1x+yC．xyx+yD．x+yxy-数学
• 计算：9+（π-2011）0-(13)-2-|-7|-数学
• In order to have the arrangements ________ for the party, the organizers have spent three days prep
• Lily got up at 6 o’clock，but she realized it was Sunday as soon as she prepared her school bag.A．as
• He speaks English well indeed, but of course not ______ a native speaker.A．as fluent asB．more fluent
• The doctor must be _______ 24 hours a day, 7 days a week in the boarding school. A．on callB．by handC
• Fortunately somebody who happened to be passing by called the emergency aid the traffic accident occ
• He had ever climbed this mountain several months before, but ________ he couldn’t find the way this
• I won’t buy the house, which was too expensive and too big. ______, I’d grown fond of our little re
• When the children were told that they could go camping on Saturday,they could to tell their best fri
• 计算：12+|3-2|-(π-3)0+(12)-1-2cos30°．-数学
• （1）计算：|3-2|-（π+3）0+2-1（2）解方程：1-xx-3+13-x=2．-数学
• Sam always pronounces my name wrong. Do you think he does it ______ ?A．on purposeB．at present C．at a
• I sincerely regret that I have hurt your feelings, but I didn’t do it ______.A．technicallyB．delibera
• US Apple decided to expand its business in China in response to an increasing demand ______ digital
• As a result of __ is now known in physics and chemistry, scientists have been able to make important
• A party was held _____ the heroes who had helped saved thousands and thousands of lives in the big e
• 计算：（-3ab-1）3-数学
• I really don’t want to go; _______ the weather is so cold outside.A．in addition B．in factC．on the c
• You shouldn’t drive fast.It’s dangerous.A．too muchB．many tooC．too manyD．much too-高一英语
• I can’t thank you ________ much because without your help I ________ have won the first prize.A．too;
• The Great Wall winds its way from west to east, _______ deserts, _______mountains and ________valley
• ______ the fact that the old cars could not go as fast as modern ones, people still watched the rac
• 计算：（1）50a+2a2-38a（a≥0）；（2）27-12+45；（3）23-1+27-(3-1)0．-数学
• good service, the restaurant offers different kinds of traditional Fujian dishes.A．In additionB．Apar
• 计算：（2007-3）0+（12）-2=______．计算：x2x-2-4x-2=______．-数学
• I gave Mary an apple_____my favorite banana.A．in place ofB．in exchange forC．instead ofD．in favour of
• 计算：（13）0+（12）-2=______．-数学
• Furniture and flooring usually come to mind when we think of ways to use bamboo. Not many of us, __
• Drunk driving, which was once a frequent occurrence, is now______.A．under debateB．under controlC．und
• During that frightening war, these foreigners fought _______ us ________ the enemy. A．with, forB．for
• The company has launched several types of cars this year, and one_______ appeals to the young.A．in r
• Intelligence does not_______ mean success. You need diligence as well.A．honestlyB．formallyC．simplyD．
• If you haven’t had enough sleep, your actions will give you _____ during the day.A．awayB．upC．inD．of
• 下列计算正确的是（）A．a0=1B．（π-3.14）0=1C．（一1）-1=1D．3a-2=13a2-数学
• 计算：①9+(π-2012)0-(13)-2-|-7|②2x2x-y-y2x-y．-数学
• I'd like to buy a house-modern,comfortable,and _____in a quiet neighborhood. [ ]A. in all B. ab
• 计算：（1）|-1|-4+(π-3)0+2-2（2）18+2-12+1-418．-数学
• Frank was offered a job in a bank, but________our surprise, he didn't take it. ( )A．toB．atC．for
• Life would be happier if we could only be born at the age of eighty and ________reach eighteen.A．en
• --Thank God you’re safe!--- I stepped back, just _______ to avoid the racing car.A．in timeB．in caseC
• （1）计算：23+(-12)-2-3-1+19+(π-3.14)0；（2）解分式方程：xx-1=32x-2-2．-数学
• I do not remember very much more about that day, _____ that the sun seemed to have stopped shining a