构成肾内髓部渗透压梯度的主要溶质是（）
A.磷酸盐和氯化钠
B.氯化钾和尿素
C.尿素和葡萄糖
D.氯化钠和葡萄糖
E.尿素和氯化钠
参考答案：E
用所给词的正确形式填空。
1. I (think) good friends should help each other.
2. My father is (athletic) than my uncle.
3. There are so many (different) between the two dictionaries.
4. My little brother is a shy boy. He is _(quiet) than me.
5. Would you like (go) to the movies with me tonight?
鼻息肉好发于（）。
A.鼻腔内侧壁
B.鼻腔外侧壁
C.鼻腔前侧壁
D.鼻腔后侧壁
