问题
选择题
若P（2，-1）为圆（x-1）2+y2=25的弦AB的中点，则直线AB的方程是[ ]
A.x-y-3=0
B.2x+y-3=0
C.x+y-1=0
D.2x-y-5=0
答案
答案：A
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若P（2，-1）为圆（x-1）2+y2=25的弦AB的中点，则直线AB的方程是[ ]
A.x-y-3=0
B.2x+y-3=0
C.x+y-1=0
D.2x-y-5=0
答案：A
请根据句意从方框中选择合适的动词, 并用其适当时态填空，使句子通顺。
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| 1. It ________________ now. Let’s wait here for the rain to stop. 2. Our English teacher often ________________ us to read English aloud every day. 3. If it is fine tomorrow, I ________________ fishing by the river. 4. Five people ________________ in the car accident, including two children. 5. I saw Lisa in the street yesterday, but she didn’t see me. She ________________ the other way. |