公元前230年—公元前221年，秦始皇采用远交近攻策略“扫六合”。秦王最后“扫”的是（     ）

Tony asks．"Does Jane exercise in the morning?"

Tony asks____Jane____in the morning．

根据短文内容，选择正确答案。
B
    Nick is my pen pal. He is 12 years old. He is from Canada. He lives in Ottawa. He speaks English and French. His favorite subject is science. He likes Chinese, too. And he says he can speak a little Chinese, but he can't write in Chinese.
    Nick likes sports, too. He likes swimming best. He goes swimming on weekends with his father. He says he can swim very well. He doesn't like physics. He thinks it's too difficult.
    Nick has a big family. There are nine people in his family, his grandpa, grandma, father, mother and his brothers and sisters. He has two brothers and two sisters. They are Bob, Tim, Jane and Susan. They are happy!

下列关于城市等级、数目与服务范围之间关系表述正确的是（   ）

某兴趣小组按如图1所示流程制取氧气，并回收提纯氯化钾和二氧化锰．

回答下列问题：