若a,b,c成等比数列,则函数f(x)=ax2+bx+c与x轴的交点个数是( )

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问题:

若a,b,c成等比数列,则函数f(x)=ax2+bx+c与x轴的交点个数是(  )

A.0

B.1

C.2

D.不确定的

考点:等比数列的定义及性质
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Mr Hua          to Japan. He’ll come back in two weeks. 

A.goes

B.went

C.has gone

D.will go

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痛肿浸润库柏韧带出现()。

A.酒窝征

B. * * 内陷

C.皮肤“橘皮样”改变

D. * * 湿疹样改变

E. * * 上抬

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How often do you let other people’s nonsense change your mood? Do you let a bad driver, impolite waiter,rude boss, or an insensitive employee  1  your day?
Sixteen years ago I learned this lesson in the back of a New York City taxi cab. One day I was in a taxi and we headed   2  the airport. We were driving in the  3  lane when suddenly a black car drove out of a parking space right in front of us.  My taxi driver slammed on his  4, slide sideways,and at the very last moment our car stopped and  5  the other car by just inches!The driver of the other car, the guy who almost caused a big accident, looked around and started  6  at us.
My taxi driver just  7 and waved at the guy. And I mean, he was  8, so I said,"Why did you just do that? This guy almost ruined your car and sent us to the hospital!” This is when my taxi driver taught me what I now call "The Law of the Garbage Truck".
He said, “Many people are like garbage trucks. They run around full of 9 full of frustration, full of anger, and full of disappointment. As their garbage  10  up, they need a place to dump it and sometimes they'll dump it on 11 .  Don’t take it personally; Just smile, wave, wish them well, and move on. Believe me. You’ll be  12 .”
So I started thinking, how often do I let Garbage Trucks run right over me? And how often do I take their garbage and  13  it to other people at work, at home, or on the street? It was then that I said, “I don’t want their garbage and I’m not going to spread it anymore.”
Life’s too short to wake up in the morning with 14 . The mark of your success is how quickly you can refocus on what’s 15  in your life. See, Roy Baumeister, a psychology researcher from Florida State University,found in his extensive research that you __16  bad things more often than good things in your life. You store the bad memories more easily, and you __17  them more frequently. So love the people who treat you right. Ignore the ones who don’t. Life is ten percent what you make it and ninety percent how you _18  it!The odds are against you when a Garbage Truck comes your way, but when you follow “The Law of the Garbage Truck”,you take back control of your life. You make room for the good by  19 go of the bad.
Have a Garbage-Free Day!Have a marvelous, garbage-free day!The seeds you plant today  20  the harvest you reap tomorrow.
小题1:
A.enrichB.ruinC.spareD.obtain
小题2:
A.throughB.toC.in D.for
小题3:
A.latterB.rightC.oppositeD.free
小题4:
A.brakesB.doorC.windowD.seat
小题5:
A.knockedB.overtookC.missedD.lost
小题6:
A.laughingB.throwingC.glancingD.yelling
小题7:
A.wonderedB.smiledC.ignoredD.guessed
小题8:
A.friendlyB.angryC.tiredD.disappointed
小题9:
A.expectationB.passengersC.garbageD.goods
小题10:
A.turnsB.pushesC.holdsD.piles
小题11:
A.roadsB.childrenC.youD.dustbin
小题12:
A.upsetB.happierC.pitifulD.frightened
小题13:
A.spreadB.shareC.explainD.contribute
小题14:
A.surpriseB.pleasureC.doubtD.regrets
小题15:
A.funnyB.importantC.strangeD.embarrassing
小题16:
A.rememberB.forgetC.valueD.appreciate
小题17:
A.enjoyB.exchangeC.recallD.imagine
小题18:
A.inspireB.takeC.mendD.notice
小题19:
A.lettingB.consistingC.makingD.dreaming
小题20:
A.distinguishB.deserveC.deliverD.determine
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TD-SCDMA和GSM共室内分布系统时,我们应该考虑哪些问题?

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杆塔倾斜度监测装置应具备哪些远程调节控制功能()。

A.身份认证、远程更新程序功能

B.按远程指令进入远程调试模式

C.动态响应远程时间查询/设置、数据请求等指令功能

D.远程指令修改采集频率、采样时间间隔等参数功能

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