擅长初高中英语数学的人进.
1、已知x,x'是方程x²+6x+3=0的两根,则x分之x'+x'分之x的值为?
2、一元二次方程7x²-(m+13）x+m²-m-2=0的两根x,x'满足0＜x＜z＜x'＜2,求实数m的取值范围.
3、解关于x的不等式x²-1≥a(a为常数）
1、Doletyourmotherknowallthetruth.Sheappears____everything
A、totellB、tobetoldC、tobetellingD、tohavebeentold
2、Thesalesmanscoldedthegirlcaught____andletheroff.
A、tohavestolenB、tobestealingC、tostealD、stealing
3、ThevisitingMinisterexpressedhissatisfactionwiththetalks,____thathehadenjoyedhisstayhere.
A、havingaddedB、toaddC、addingD、added
4、Don'tusewords,expressions,orphrases____onlytopeoplewithspecialknowledge.
A、beingknownB、havingbeenknownC、tobeknownD、known
5、Idon'tmean____youbecausewhatihavesaidreallymeans____youtobegood.
A、tohurt;toadviseB、tohurt;advisingC、hurting;advising
D、hueting;toadvise
6、Themotherdidn'tknow____toblameforthebrokenglassasithappenedwhileshewasout.
A、whoB、whenC、howD、what
7、Iconsidered____myjob,butintheendidecided____.
A、tochange;todonotB、changing;nottoC、changing;nottochangeD、tochange;notto
8、Iwouldappreciate____backthisafternoon.
A、youtocallB、youcallC、yourcallingD、you'recalling
英语要求写出原因,
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