圆x2+y2-ax+2=0与直线l相切于点A(3,1),则直线l的方程为( )

题型:选择题

问题:

圆x2+y2-ax+2=0与直线l相切于点A(3,1),则直线l的方程为(  )

A.2x-y-5=0

B.x-2y-1=0

C.x-y-2=0

D.x+y-4=0

考点:直线与圆的位置关系
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短文改错(共10小题,每小题1分,满分10分)

Get a good education is more important today than    小题1:.________

ever before.In Canada mostly children attend public  小题2:____________

schools.Public schools are mainly found by governments小题3:________

through tax income.Students in Canada taught in       小题4:_______

English and French.The rests of Canadian children    小题5:_____________

attend private schools, that are supported mainly by fees小题6:_____________

paying by parents.By law, the children must attend    小题7:______________

the school from age 5 to 16.There are several different小题8:____________

levels in the Canadian education system.The first was  小题9:_____________

called Elementary Schools, which include kindergartens  小题10:__________

through grade 7 or 8.

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请简述《安全文明施工实施细则》中“安全文明施工要求及实施”应包括哪些主要内容。

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债券市场对于股票市场具有领先的指示作用,而( )则更为领先。

A.短期国债市场

B.长期国债市场

C.长期国债期货市场

D.股票指数期货

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举证责任

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甲因行窃被失主发现,为逃跑而与失主扭打在一起。此时,甲的好友乙路过见状即上前对失主进行拳打脚踢,致失主重伤。下列说法正确的是()。

A、乙构成盗窃罪的共犯

B、乙构成抢劫罪的共犯

C、乙构成故意伤害罪

D、乙不构成犯罪

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