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问题
填空题
直线x-2y+5=0与圆x
2
+y
2
=8相交于A、B两点，则|AB|=（ ）。
答案
连线题
连线。
1. What's this?
2. How many markers do you have?
3. What's his name?
4. Where isLi Ming?
5. What's he doing?
A.He's playing ping-pong.
B.He is in the gym.
C.Eight in all (总共).
D.It's paper.
E.His name is Li Ming.
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单项选择题
涡流试验中检验速度决定于（）.
A．磁通密度；
B.试验频率；
C.传动装置；
D.试验线圈阻抗
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