用所给词的适当形式填空。

1. Look! Whose ______ (Walkman) are these? Perhaps they are the twin's.

2. Is there an ______ (electric) shop in your town?

3. Amy wants to buy some presents for ______ (they).

4. Do you understand the ______ (mean) of the new world?

5. Do you like to have cold ______ (drink)?

关于房室交界区性逸搏错误的是（）

A.与房室交界区自律性增高有关

B.是一种生理保护机制

C.房室传导阻滞时可出现

D.与迷走神经张力增高有关

E.显著窦性心动过缓时可出现