[单选题]下面给出的关系式:①;②;③;④;⑤正确的个数是A、0B、1C、2D、3
[单选题]As we know, a red jacket doesn’t _____ green trousers. But when a little girl wears them, they ____her very well.A.fit, suitB.suit, fitC.match, suitD.fit, match
[单选题]设a、b、c分别为△A.C的三内角A、B、C所对的边,则a2=b(b+c)是A=2B的[ ]A.充要条件B.充分而不必要条件C.必要而不充分条件D.既不充分也不必要条件
[单选题]________time went on, the people in the area came to realize how seriously the environment had been polluted.[ ]A. AsB. WithC. WhenD. While
[单选题]--- Is this the book you are looking for--- Yes. It’s the ________ one I am after. A.muchB.veryC.justD.so
[单选题]She devoted herself entirely________helping the children who suffered a lot from the earthquake.[ ]A. inB. forC. toD. with
[单选题]A bus passed________ just a moment ago.A.onB.byC.inD.at
[单选题]—How much did the guy ________ you to fix your 3G mobile phone—I don’t remember,but it was quite a lot.A.costB.spendC.charge D.take
[单选题]下列命题中是假命题的是[ ]A.α,β∈R,使cos(α+β)=cosα+sinβB.x>0,有ln6x+ln3x+1>0C.彐m∈R,使f(x)=(m-1)·xn2一4是幂函数,且在(0,+∞上递减D.vap∈R,函数y=sin(2x+φ)都不是偶函数
[单选题]设a∈R,则a>1是的( )A.既不充分也不必要条件 B.必要但不充分条件C.充要条件D.充分但不必要条件
[单选题]There is, __________ , one further point to make.A.in peaceB.in addition C.in cashD.in relief
[单选题]Those who are ______ their present situations will surely make no more advances in life. A.content toB.satisfied ofC.pleased toD.content with
[单选题]-We are afraid we cant finish the task ________ a month.-Take your time, but next month youll have a new one.[ ]A.withinB.byC.amongD.after
[单选题]The athletes years of hard working________when she finally won the Olympic gold medal.A.went onB.got overC.ended upD.paid off
[单选题] Many websites have been _______ to help people study foreign languages.A.set up B.set offC.set downD.set out
[计算题]过点P(4,2)作直线l交x轴于A点、交y轴于B点,且P位于AB两点之间.(Ⅰ)AP=3PB,求直线l的方程;(Ⅱ)求当AP. PB取得最小值时直线l的方程.
[单选题]Miss Smith often says “God helps those who help themselves”, intending to________ on us the significance of being independence.A.baseB.urgeC.focusD.rely
[计算题]已知,求(1);(2)与夹角的余弦值.
[单选题]He knows several languages ________ English, French and Japanese.A.such asB.for exampleC.namelyD.that is
[单选题]—Youd better leave the key at home __________ one of us should think of coming back.—?Why? Is your key lost? [ ]A. in that caseB. in case ofC. in no caseD. in case
[单选题]It’s said that the power plant is now ______large as what it was. A.twice as B.as twice C.twice much D.much twice