注射青霉素引起过敏性休克，血压下降，是由血管活性物质引起的生物学效应，这种休克的发生是由哪种效应所致（）

A.支气管平滑肌收缩

B.腺体分泌增加

C.毛细血管扩张

D.血管通透性增加

E.以上全部是

用所给词的适当形式填空。

1.  All of us are____  (tiring) after working for a week.

2.  The students get____(noise) when they study in groups.

3.  He likes falling asleep____ (listen) to music.

4.  I am hungry and I want something nice____(eat).

5. The sea is so____(peace) after a strong storm.

6.  It all happened so____(sudden).