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【单选题】
与直线3x一4y一20=0平行且距离为3的直线方程是A.
3x一4y一5=0
B.
3x一4y一35=0
C.
3x一4y一5=0或3x一4y一35=0
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A.
What are you doing with the blackboard?
B.
What are you doing with the black board?
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A.
to repair
B.
be repaired
C.
repaired
D.
Repairing
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A.
Can't they be mended?
B.
Let me have a look at it.
C.
How much do they cost?
D.
Can't they mended?
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