选择适当的选项补全对话。

A. Is he friendly? B. Yes, you're right. C. A boy or a girl? D. Who's he? E. No. He has glasses and his shoes are blue.

John: Hello, Sarah! I have a new friend.
Sarah: ____
John: A boy.
Sarah: ____
John: He is tall and thin. He has short hair.
Sarah: ____
John: Yes, and he is nice, too.
Sarah: Is he Mike?
John: ____
Sarah: I know. He is Peter. He is near the door.
John: ____

歌曲《雅拉玛》中唱道：“有个山谷叫雅拉玛／人们都在怀念着它／多少个同志倒在山下／雅拉玛开遍了鲜花／国际纵队留在雅拉玛／保卫自由的国家／他们宣誓要死守山旁／打败法西斯狗豺狼”。上述歌词所反映的历史事件为   （     ）

设的        （   ）

地震发生时，在水中游泳的人会感到

生物大分子通常都有一定的分子结构规律，即是由一定的基本结构单位，按一定的排列顺序和连接方式形成的多聚体，下列表述正确的是（  ）