关于反复搏动的表述，不正确的是（）。

A.指激动传导过程中发生回折，使激动起源的心腔再次被除极

B.反复搏动一定有房室交界区的参与

C.属于一种特殊形式的折返

D.仅表现单次折返

E.发生反复搏动最常见的部位是房室交界区

根据句意和词首字母完成句中所缺的英语单词。

1. E______ me, may I use your pen?

2. 一What c______ is it? 一It's red.

3. These questions are very d______.

4. My name is Sandra Clark, Sandra is my f______ name.

5. 一Is the gird your d______? 一Yes, I'm her mother.

6. Your u______ is your father or mother's brother.

7. Look! My m______ book is On the table.