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问题 选择题

下面为某一波的图象和该波上一质点P的振动图象，根据图象正确的是（　　）

A．Q点速度向y轴正方向

B．P点振幅为10cm

C．波向右传播，v=10m/s

D．波向左传播，v=10m/s

答案

A、由于波的图象对应的时刻未知，所以无法根据振动图象读出P点的振动方向，也就无法知道图示时刻Q点的振动方向．故A错误．

B、由波动图象读出P点的振幅A=10cm．故B正确．

C、D由波动图象读出波长λ=4m，由振动图象读出周期T=2s，则波速v=

λ
T
=2m/s，而波的传播无法确定．故CD错误．

故选B

完形填空

Do you often think of your parents? You may say, “Of course, I   小题1: . I buy a gift for my mother on Mother’s Day and on Father’s Day I give my father a gift, too.” But what about the other days of the year?

I have a friend. She  小题2: in Shanghai and her parents live in another city. One day I went to see her. We talked with each other happily. Then she wanted to  小题3: her parents. So she dialed（拨号）the number, but then she put down the phone. After about fifteen minutes, dialed the number again. “Hi, Mom…”

Later I asked, “ 小题4:  did you dial the number twice?” She said, “My parents are old and slow(慢) . They   小题5: get to the telephone quickly. I always do so when I call them   小题6:  I want to give them enough time to answer the call.”

My friend is a   小题7: girl. She is always thinking about her parents. You also want to be a good child, right? Please always remember   小题8: think of your parents, not just on some important days.
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单项选择题

擅自委托或接受委托生产药品的，对委托方和受托方均应按（）

A．按无证经营处罚

B．按制售假药处罚

C．按制售劣药处罚

D．按违法购进药品处罚

E．按破坏市场经济秩序处罚
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