哪一种方法是治疗骨质疏松的最佳方案（） A.运动疗法和补钙 B.单纯补钙 C.多吃含

用所给词的适当形式填空。

1. This is our _____ (twelve) lesson, Tom, please listen carefully.

2. Does the key ring belong to ______ (I)?

3. I think we need about 15 ______ (loaf) of bread.

4. We look forward to ______ (win) the match.

5. Each of you ______ (have) a nice bike, right?

6. I ask my brother ______ (run) along the street.

7. — _____ Mary ______ (visit) her grandmother next Friday?

   — Yes, she is.

8. Take the second ______ (turn) on the right.

9. Look! The children are laughing _____ (happy).

10. The _____ (cook) in the kitchen are cooking nice food for people.

关于黏液表皮样癌的叙述正确的是（）

A.好发于青少年

B.大多数发生于男性

C.多见于舌下腺

D.小涎腺多发于舌腺

E.均属恶性，但恶性度不同

下列哪个激素更符合异位激素的条件（）

A.由肾上腺皮质网状带分泌的睾酮

B.由膀胱壁间神经节嗜铬细胞瘤分泌的儿茶酚胺

C.由心房细胞分泌的利钠多肽

D.由小细胞未分化肺癌分泌的抗利尿激素

E.由胰岛D细胞分泌的生长抑素

楚国从哪位君王开始对中原形成威胁？