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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