问题
选择题
介质中坐标原点O处的波源在t=0时刻开始振动,产生的简谐波沿x轴正向传播,t0时刻传到L处,波形如图所示。下列能描述x0处质点振动的图象是
![](https://img.ixiawen.com/uploadfile/2017/0426/20170426015325985.gif)
A.
B.
C.
D.
答案
答案:C
介质中坐标原点O处的波源在t=0时刻开始振动,产生的简谐波沿x轴正向传播,t0时刻传到L处,波形如图所示。下列能描述x0处质点振动的图象是
A.
B.
C.
D.
答案:C
从下面七个选项中选出四个完成对话。 | |
A: Hello, Jenny! B: 1_______ A: Oh, Jenny! This is my friend Jessie. B: Hi, Jessie. 2_______ A: Nice to meet you, seat? B: 3_______ A: Oh, great! We're sitting together. B: 4_______ A: We're going to Beijing. B: So nice! I'm going to Beijing, too. A: OK, let's sit down.
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