问题
单项选择题
一平面简谐波在t=3/4T时刻的波形图如图示，该波以u=36m/s的速度沿x轴正向传播，则在t=0时刻0点的初位相是（）。
A.π/4
B.π/2
C.π/3
D.π
答案
参考答案：B
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一平面简谐波在t=3/4T时刻的波形图如图示，该波以u=36m/s的速度沿x轴正向传播，则在t=0时刻0点的初位相是（）。
A.π/4
B.π/2
C.π/3
D.π
参考答案：B
| 选词填空。 用方框中短语的恰当形式完成句子。 | |
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