关于药物安全性评价的说法中，正确的是 A．临床安全性评价比疗效评价更简单 B．人类的

女性，30岁。2天来进行性双下肢瘫痪，尿便障碍，体温正常。胸水平以下深浅感觉丧失和截瘫。脑脊液检查压力正常，白细胞80×10／L，（80个／mm），淋巴细胞占80%，蛋白轻度增高。

最可能的诊断为（）。

A.脊髓出血

B.急性脊髓炎

C.脊髓肿瘤

D.多发性硬化

E.急性硬膜外脓肿

用so, to, because 填空。

1. I didn't come out early, __________ I missed the early bus. 

2. She went there __________ work as a librarian.

3. It was quite late, __________ we decided to go home.

4. He must be a good student, __________ he always do something well.

5. It's not difficult for you __________ learn English if you work hard in the right way.

6. I was very tired, __________ I went to bed early.

7. He bought a lot of presents __________ make his mother happy.

8. _________ know about English is one thing, and to know English is quite another.

9. He didn't come to school, __________ he was ill yesterday.

10. They are having an important meeting, __________ you can't go into the room.

评估睡眠形态的重点内容是什么?

姜片虫的中间宿主是（）

A.扁卷螺

B.钉螺

C.中华按蚊

D.淡水川卷螺

E.水生植物