有关东南亚位置叙述正确的是 ( ) A．五海三洲之地 B．十字路口的位置 C．中

阅读理解。

     Many people have the wrong idea about pigs. Pigs are actually very clean animals. On farms, they live in

dirty places. So, they become very dirty. In the wild, pigs keep very clean.

     They are also really smart. They may be smarter than dogs. So, pigs can learn things from people. Pigs

are very friendly animals. Some people raise (喂养) them as pets. Of course, people keep the small kind, not

the big kind. Small pigs are very cute. And they don't break things in the house. Big pigs usually live outside

on farms, not in people's houses.

1. Which words can describe pigs?

A. Dirty and stupid.

B. Nervous and strange.

C. Dangerous and unfriendly.

D. Clever and friendly.

2. What does "in the wild" mean?

A. On farms.

B. In nature.

C. Being crazy.

D. In people's houses.

3. Which of the following is TRUE?

A. Pigs like to be dirty.

B. People can teach pigs things.

C. Dogs are smarter than pigs.

D. Only farmers raise pigs.

4. What kind of pigs are raised in people's houses?

A. The very big kind.

B. The ugly kind.

C. This kind from farms

D. The small kind.

5. What is NOT mentioned (提及) in this passage?

A. Raising dogs.

B. pigs on farms and in the wild.

C. Pigs as pets.

D. People's wrong ideas about pigs.

a=2×3×m，b=3×5×m（m是自然数且m≠0），如果a和b的最大公约数是21，则m是______．

一个良好的嵌体蜡型应该是

A．完全覆盖缺损部位

B．与洞形密合

C．咬合关系正确

D．恢复邻接关系

E．以上都对

若孩子无论如何哄逗仍是啼哭不止，应密切观察，必要时应立即看（）。

A、妈妈

B、医生

C、爸爸

D、护士

起源于脉管组织的恶性肿瘤（相对恶性）为（）

A.血管瘤

B.血管球瘤

C.血管内皮瘤

D.淋巴管瘤

E.血管瘤病