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化简的结果是()。-九年级数学
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Experience of this kind in both the U.S. and Europe well before the Second World War.A.have conducte
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—Pity you missed the lecture on nuclear pollution.—I____ it, but I was busy preparing for a job inte
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Cindy , who went to university last month, spent 1000yuan more than she___for livingexpenses. A will
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— You look tired.— Yes. I ___ non-stop until 8 o’clock this morning.A.had workedB.workC.have workedD
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She ____ her husband three years ago, and soon ____ a man with a lot of money.A.divorced; marriedB.d
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-----What is the noise?-----Oh, I forgot to tell you. The new machine _________.A.was testedB.will b
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下列各式计算正确的是[]A.10a6÷5a2=2a4B.C.2(a2)3=6a6D.(a-2)2=a2-4-九年级数学
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下列计算正确的是[]A.=-3B.()2=3C.=±3D.-九年级数学
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计算=()。-九年级数学
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利用计算器探索:已知按一定规律排列的一组数:1,,,,……,,,如果从中选出若干个数,使他们的和大于3,那么至少要选()个数。-九年级数学
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—The movie Till Death Do Us Part 《最爱》will be on at 8 pm.What about picking you up at 7pm?—All right.
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计算:()。-九年级数学
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Last month, the Japanese government expressed their thanks for the air they_______ from China.A.rece
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计算:。-九年级数学
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若a、b为有理数,且,则a·b=()。-九年级数学
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下列计算正确的是[]A、+=B、2+=2C、3+2=5D、-九年级数学
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After a fire broke out in the workshop, a lot of equipment ____.A.is damagedB.had damaged C.was dama
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Hello! I ________ you _______ in London. How long have you been here?A.don’t know, wereB.hadn’t know
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时钟上的分针匀速旋转一周需要60分,那么经过10分钟分针旋转了();三角形的三边长分别为,,,,则这个三角形的周长为();下图可以看作是一个等腰直角三角形旋转若干次而生成-九年级数学
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It was the third time that I _______of the changes of the timetable.A.had informedB.has informedC.ha
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计算2-3-+的结果是[]A.B.C.D.-九年级数学
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-Have you moved into the new house?-Not yet. The rooms .A.are paintedB.are paintingC.are being paint
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计算:=()。-九年级数学
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计算:=()。-九年级数学
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下列计算中正确的是[]A.B.C.D.-九年级数学
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Some of the wolves there _________ their fur. A.are hunting B.are hunting for C.are hunted forD.hunt
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In the near future more advances in the robot technology ______ by scientists.A are making B in made
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It is the most instructive lecture that ________since I came to this school.A attended B had attende
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In 1492, Columbus_______ on one of the Bahama Islands, but he mistook it for an island of India.A la
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计算:(-1)2009-+=()。-八年级数学
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There is no light in the room. They must have gone to the lecture.__________?A.didn’t theyB.haven’t
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Once fighting_____ between the two villages and many people were killed.A.broke outB.was broken out
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下列计算错误的是[]A.B.C.D.-九年级数学
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计算:(1);(2)。-九年级数学
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Iguessyouwereinahurry.Look! You_______yoursweaterinsideout.A.hadwornB.woreC.arewearingD.werewearing-
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下列计算正确的是[]A.(a-b)2=a2-b2B.a2·a3=a5C.2a+3b=5abD.3-2=1-九年级数学
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下列各式运算中,正确的是[]A、3a·2a=6aB、C、=2D、(2a+b)(2a-b)=2a2-b2-九年级数学
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Stop! You can never touch this machine when it ________, it is very dangerous. A.has been operatedB.
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It was the first time we _______ a film in the cinema together as a family.A.seeB.had seenC.sawD.hav
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By the time these books were published, he _____ addicted to them.A.had becomeB.becomesC.has becomeD
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化简:2-=()。-八年级数学
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The number of people in the world__________ about 6 billion and large quantities of waste ____ each
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--- Joan, what_________in your hand?--- Look! It's a birthday gift for my grandmother.A.had you
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计算:(1);(2)。-八年级数学
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My parents have promised to come to see me before I ____for Africa.A.have leftB.leaveC.leftD.will le
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—-Computers are becoming more and more important these years.—-Yes. Without them human life quite di
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—-Is it possible for us to meet at ten o’clock tomorrow morning?—-Sorry, it is certainly not. I an i
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计算:=()。-九年级数学
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(1);(2);(3)化简:。-九年级数学
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计算:。-九年级数学
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