6. 已知直线的方程为,直线的方程为(为实数).当直线与直线的夹角在(0,)之间变动时,的取值范围是
A.(,1)∪(1,) B.(,) C.(0,1) D.(1,)
5. 为圆内异于圆心的一点,则直线与该圆的位置关系为
A.相切 B.相交 C.相离 D.相切或相交
4. 若圆上至少有三个不同点到直线:的距离为,则直线的倾斜角的取值范围是
A.[] B.[] C.[ D.
3. 若直线与直线互相垂直,那么的值等于
A.1 B. C. D.
1在直角坐标系中,直线的倾斜角是
A. B. C. D.
2.直线l经过A(2,1)、B(1,m2)(m∈R)两点,那么直线l的倾斜角的取值范围是
A. B. C. D.
11. As soon as we went ________, our ship left port.
A. above board B.across the board C.on board D.by the board.
10.He is always the first ___________and the last ____________
A.to come ;to leave ing ;to leave ing ,leaving e; leave
9. Though it was the first time __________there, I got used to the climate very well.
A. that I have been there B.which I had been C.I had been D.I have been
8.________his proposal, there are pros and cons.
A. Concerning cerned cern D.to concern
7. At the party there was food ___________.
A. in abundance B .with abundance C. of abundance D. at abundance
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