下列属于纯净物的是（   ）

动物细胞工程技术的基础是（　　）

选出相对应的答句。

①What size do you want? ____        A. Yes, she does.

②Does Lulu like rabbits?  ____         B. He's a farmer.

③What's your father do?  ____         C. Size 25, please.

④Do you have any shoes? ____         D. Yes, I am.

⑤Are you a teacher? ____          E. Yes, we do.

1127年，宋钦宗的弟弟____在应天称帝，后来定都____，历史上称为南宋。