面积8公顷的长方形鱼池，宽是200米，长是（）米。
A. 4
B. 400
C. 40
The diesel engine is similar to the gasoline engine in that （）.
A. both of them are ignited by compressed air
B. both of them are the forms of external combustion engines
C. both of them have spark plugs
D. the power is developed by the piston in the cylinder
在Flash中，所有类型的动画效果都可以用（）制作出来。
A. 运动动画
B. 逐帧动画
C. 引导线动画
D. 形变动画
本案调查人员也可以担任听证主持人、听证员或记录员。
A. 正确
B. 错误
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