根据句意及汉语提示，填写单词。

1. The girl read the _____ (诗) after her mom had read it.

2. His article _____ (出现) in yesterday's paper.

3. The concert was quite a red _____ (成功且轰动一时的事物) in New York.

4. Come on, Tom. It's your _____ (一次机会) to recite the text now.

5. Jim, go to see if the morning _____ (邮件) has already come.

（2011）对于机械横波而言，下面说法正确的是：（）

A.质元处于平衡位置时，其动能最大，势能为零

B.质元处于平衡位置时，其动能为零，势能最大

C.质元处于波谷处时，动能为零，势能最大

D.质元处于波峰处时，动能与势能均为零