嗜铬细胞瘤手术，血浆中儿茶酚胺浓度（）。

A.升高

B.降低

C.无变化

D.先升高后降低

E.先降低后升高

根据句意及首字母提示完成句子.

1. It's very c         outside.You'd better put on more clothes.

2. The weather in spring here is very h      . It often rains.

3. Liu Qiang feels very r         when he listens to the light music.

4. I am very s       that the little boy can carry the heavy box.

5. Some people wear s         in winter.