根据句意结合提示或首字母填空（每空一词）。

1. There will be a p__________ meeting after the mid-term exam.

2. English isn't d__________ to learn if you try your best.

3. She does exercise every day in order to be __________ (苗条) than before.

4. He was very excited when he found an _________(寻常的) monkey in the mountain.

5. __________ (相信) it or not, his cat isn't afraid of dogs.

6. What p__________ weather we have today!

7. The tallest man was 2.72 m in h___________.

8. It's important to keep o___________ safe when we go diving.

对于一种严重的致死性疾病，评价某种一级预防措施的效果时最恰当的指标是（）

A.患病率

B.罹患率

C.发病率

D.病死率

E.死亡率