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微积分的 题 最后一步|dx/(x-3)(x+2) 一个微积分的题,f(x,y)=c(2-x-y),c为常数,x[0,1] ,y[0,1]这个怎么积分?表示没学过积分却要用积分算概率很痛苦...表示这个∫∫f（x，y）d(x)d(y)我知道,但是这一大堆表示的是什么意思我不知道 一个微积分的题 A lighthouse is fixed 100 feet from a straight shoreline.A spotlight revolves at a rate of 16 revolutions per minute,(32 rad/min ),shining a spot along the shoreline as it spins.At what rate is the spot moving when it is along t I fell in love with this kind of 两个英语单选题1.James has just arrived,but I didn’t know he_________ until yesterday.A、will come B、is coming C、was coming D、comes为什么选B?不太懂2.He is quite worn out from years of hard work.He is not the man he was twenty ye It usually____in February.A.come B.comes C.is coming It usually __in February or March 形容石头的成语,但不含“石”字,成语可以联想或者联系到石头的? My father usually lunch at home.填空补缺并翻译 My father and I are at home=My father --------me---------at home 【英语】She usually ____ home after 9:00 pm.横线上是填leaves,gets还是gets to? 8464什么意思 有谁知道8464什么意思`》?答对了赏本少爷 热吻一个!说真的 有谁知道 已知(x²+y²-3)(x²+y²+1)=12已知(x²+y²-3)(x²+y²+1)=12,求x²+y²的值 法国当地时间2010年12月24日中午12:30 对应的北京时间是多少 y=x²怎样平移得到y=x²+2x+8 英语单选题（请详细解释）1.Uncle Wang is going to Beijing.He is packing his suitcase____clothes.A.on B.with C.of D.in 2.----Can I help you?----I want____,please.A.two socks B.two pair of socks.C.two pairs of socks D.two pairs of sock3.____ 孤寂的反义词是什么? 2道英语单选题,要求正确答案和详细的解说1、He gets a good salary.His salary is very _______. A. good B. well C. fine D.beatiful2、His boat, ____________ is Topsail(一条船的名字),is famous. A.whose the name 反义词：孤寂（ ） 沉寂（ ） 英语单选题（请具体说明）1.Would you like to come to our house_____supper?A.at B.for C.with D.from2.Everyone in the room____quiet.A.is B.are C.were D.stand3.They____eat apples at all.A.always B.usually C.sometimes D.never4.How is the weath 孤单的反义词是什么 孤单的反义词试什么 若不等式f(x)-g(x)≥a的二次-3a的解集为R,求实数a的取值范围 问两道英语单选题It is better to drive your car at a stendy--------than to stop and start a lot.path race rete wheelUnexpectedly,she was even ---------the right to attend the meeting.dismissed denied declined disrupted 形容植物的成语和句子咋没句子呢 1,Great changes ______in our school in the past 10 years.A`took place B`were take place C`have taken place D`have been taken place C,D怎么看啊2,patience is a kind of quality and that's ________it takes to do anything well.A`what B`taht C`which D` 1.What's her number?___.I have it here somewhere.A.Let's have a look B.I see C.Let me see D.I beg your pardon2.May I speak to Professor Black,please?Sorry ,but he is busy____an experiment in the lab right now.A.conducting B.working C.acting D.researc ..50分1._______,he sat up late preparing the opening speech for Auto Shanghai 2007.A.as he was tired B.tired though was he C.tired as he was D.it is because he was tired 2.his interest is flying.when studying at Yale University,he _____ set up the Y 问,两道相似的英语单选题Energy,passion and a burning desire are,you see,____ true learning takes.A.that B.what C.how D.which 选B____ different life today is ___ what it was 20 years ago! A,How；from B.what a ；from C.what;f win7中的32位和64位,这两个系统有什麼不同其中32位是什麼,64又表示什麼.这两个系统有什麼不一样,为什麼要分32位和64位呢? 426,37,534,33,736!96,934,7436,63,542,28,326,