用所给单词的适当形式填空。

1. How ________ (heavy) it is snowing! He felt now ________ (alone).

2. The village was ________ (sleep) and quiet, but he sat deep in ________. (think)

3. I often hear him ________ (sing) in the next room.

4. Do you know the way ________ (write) a limerick?

5. This kind poem ________ (create) by an American poet in the nineteenth century.

阿司匹林作用与相应机制不符的是

A．解热作用是抑制中枢PG合成
B．抗炎作用是抑制炎症部位PG合成
C．镇痛作用主要是抑制中枢PG合成
D．水杨酸反应是过量中毒表现
E．预防血栓形成是抑制TXA₂＞PGI₂