单词填空。

1. That dictionary isn't mine; it b_______ to the library.

2. She is an able girl and she d_______ all her dresses.

3. I f_______ he's pretty happy.

4. She r_______ the painting to another wall.

5. He bought me a v_______ diamond ring as a birthday present.

6. The great hall was d_______ with flowers.

7. That novel isn't w_______ reading.

8. Catherine works at the l_______ post office.

神经元兴奋性突触后电位产生的主要原因是（）。

A.K+内流

B.K+外流

C.Na+内流

D.Na+外流

E.Cl-内流