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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,)

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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

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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.

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3. 若直线与直线互相垂直,那么的值等于

    A.1           B.      C.        D.

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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.

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11. As soon as we went ________, our ship left port.

A. above board     B.across the board    C.on board    D.by the board.

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10.He is always the first ___________and the last ____________

A.to come ;to leave  ing ;to leave   ing ,leaving e; leave

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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

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8.________his proposal, there are pros and cons.

A. Concerning    cerned     cern     D.to concern

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7. At the party there was food ___________.

A. in abundance    B .with abundance  C. of abundance   D. at abundance

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