（1）计算：(-2)0-(13)-1-|-3|+2sin60°；（2）先化简，再求值：已知x=2+1，求（x+1x2-x-xx2-2x+1）÷1x的值．-数学

更多内容推荐

• —Are you free this evening? —Sorry, I’ve promised to have Mary’s radio repaired ____ for her help wi
• 计算：（-4）-2×（-2007）0=______．-数学
• My grandfather spends most of his time _______ because he loves nature. A．outdoorB．outdoorsC．indoorD
• This kind of music is not _____. Only a few people enjoy it.A．sounds beautiful B．for my appetiteC．to
• Li Gang was required to apologize ________the people present at the meeting________what he had done.
• Einstein was famous _________ a scientist _______ his Theory of Relativity.A．for;forB．as;forC．for;as
• -----Have you been to New Zealand? -----No, I’d like to, _____.A．tooB．thoughC．yetD．either-高二英语
• (2013·高考陕西卷)The manager wants to see changes in the company，and I am sure he will________.A．in parti
• (2013·高考江苏卷)I am always delighted when I receive an e­mail from you.________ the party on July 1
• （3b24a3）-2•（-32a-2b）3=______．-数学
• She was ______ good terms with her twin sister, because they were two of a kind. In other words, th
• I can’t spend___ money on the car which is ___expensive for me .A．too much ; much tooB．far too； too
• 化简（a-3）-2（bc-1）3=______．（结果只含有正整数指数形式）-数学
• The students were participating an international energy saving competition between towns in New Engl
• ，the wind died down and people began to appear on the street.A．A bit lessB．Little by littleC．A littl
• Our teacher entered the classroom, __________.[ ]A. a book in handB. book in handC. book in his hand
• (2013·高考辽宁卷)________everyone here，I wish you a pleasant journey back to your country.A．By means ofB．
• 计算，并使结果只含正整数指数幂：（a-3b-2）-2•（ab3）-3=______．-数学
• — What is that building ______ construction ? — It looks like a hospital..A．underB．onC．inD．through-高
• TV talk shows have covered every inch of space on daytime television . And everyone , who watches th
• _____, the pay isn't attractive enough, though the job itself is quite interesting.[ ]A. Genera
• (12012)-1的值是（）A．-2012B．2012C．-12012D．12012-数学
• Sarah had to call a taxi because the box was _______ for her to carry all the way home.A．much too he
• Just a few months before the examination the lazy bone studied day and night _____ that he shouldfai
• ________ they heard the shout for help，they rushed out.A．ImmediatelyB．The moment C．The minute D．All
• 下列等式中正确的是（）A．（-0.1）-2=100B．2a-3=12a3C．yx=y2x2D．3-x-y=-3x-y-数学
• Although the old man was ______ death, he still fought with the disease bravely.A．at the end ofB．on
• (2013·高考福建卷)Mrs.Smith finds it hard to clear up the mess，as her children are always ________ wheneve
• Do you dress differently because of what you see in advertisements or buy things you might not _____
• — How long do you think it is?— It is ________ two metres.I can touch its top. [ ]A. at leastB. at p
• 若（x-3）0无意义，则x2+x-2=______．-数学
• She was not______ frightened; in fact, she was nearly frightened to death. A．a bitB．a littleC．at al
• Women usually like to get together to talk about daily affairs _____ clothing and food.[ ]A. more th
• To children, good habits do not come, so parents and teachers need to be their role models.A．instant
• （x2yz-1）2（2xy-2）-3-数学
• How could she be so calm in front of so many people? It is really _______me.A．acrossB． againstC．beyo
• By sending text messages or chatting online, we’ve been in touch for months, but I’ve never met my n
• (2013·高考浙江卷)It will be a big help if you go to the store and get what we need for dinner.________，I’
• Student loan is supposed to provide financial support for people who would ______ not be able to go
• The openair celebration has been put off ________ the bad weather.[ ]A．in case ofB．in spite ofC．inst
• The person in charge of the meeting asked the people present to sit ______ together and listen______
• Unfortunately, George cannot be with us today so I am pleased to accept this award____ him. w.w.A．in
• David apologized to me yesterday. __, I won't forgive him for it was not the first time that he
• 下列运算中，正确的是（）A．（-2）0=-1B．（-2）-1=2C．4a-2=14a2D．a÷a3=1a2-数学
• A clean environment can help the city bid for the Olympics, which ______ will promote its economic d
• What a mess! Tom, I have told you over and over again not to leave everything _____.A．in placeB．in t
• (2013·高考山东卷)The Smiths are praised ________ the way they bring up their children.A．fromB．by C．atD．fo
• The incomes of skilled workers went up. ______， unskilled workers saw their earnings fall.A．Moreover
• 计算：a-2b2．（a2b-2）-3-数学
• Though they are very busy every day, they manage to get tighter_______.A．by and byB．now and thenC．