What did his idol look like?
A. white
B. tall
C. black
D. not mentioned
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How did his idol influence on the author?
A. The author picked his college major because of him.
B. The author spent most of his time off the football field trying to be Stu.
C. The author tried very hard to replicate him.
D. The author picked his college major as kinesiology.
Why couldn’t his idol be replicated?
A. He was smart, quick-witted.
B. His act was so groundbreaking.
C. It is too difficult.
D. Everyone that tried to replicate him is a knockoff.
机械波的表达式为y=0.03cos6p(t+0.01x)(SI)，则
A.其振幅为3 m．
B.其周期为．
C. 其波速为10 ms．
D. 波沿x轴正向传播．
一静止的报警器，其频率为1000Hz，有一汽车以79.2km的时速驶向和背离报警器时，坐在汽车里的人听到报警声的频率分别是_____和________（设空气中声速为340m/s）．
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