根据句意及首字母补全在本课中出现的单词。

1. Brian has four books f _____ of stamps.

2. Stamp collecting would be an e _____ hobby.

3. The hole is too small.  I can't go t _____  it.

4. It's spring It's the best to g _____ trees.

5. "See the s _____ I put on the box,"Danny said.

气胸对呼吸系统的影响包括（）

A.降低肺容积、肺活量、最大通气量等

B.降低胸廓容量

C.使吸气肌肉的初长缩短，可产生的最大吸气压力减小

D.导致肺通气血流比例的异常

E.降低呼吸中枢驱动