问答题

瑞雷面波的传播能量沿方向传播衰减快，沿方向传播衰减慢。

答案：垂直于界面 ...

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过去人们要取得文凭，就得去实体学校报名上课。
1）In the past, peple wanted to get a diploma, they had to sign up for couses at a brick-and-mortar college and attend class physically.
2）In the pasts, if peple wanted to get a diploma, they had to sign up for course at a brick-and-mortar college and atten class physically.

The first English version is wrong, becuase it is a run-on sentence(流水句）.
A、正确
B、错误

答案： A

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