肠梗阻的四大共同表现 A．腹痛、肠型、呕吐、便闭 B．便闭、呕吐、腹胀、腹痛 C．便

根据所给单词的适当形式填空。

1. He often _______ (act) as a bad man in movies.

2. My father _______ (save) some money last year and he didn't tell anyone.

3. Are you going to practice _______ (much) or less English this year?

4. The story sounds_______ (interested).

5. He is a _______ (profession) dentist, he will look after your teeth well.

6. In three years they _______ (built) another highway.

7. You have to _______ (practiced) your English harder, or you'll fail in the exam.

8. Do you enjoy_______ (communication) with foreigners?

9. What about _______ (move) to Shanghai?

10. A lot of readers are going to make their New Year's _______ (resolute) tonight.

属于肿瘤发病机制的有()

A.阶梯式遗传性疾病

B.基因变异

C.表观遗传学（epigenetics）改变

D.DNA损伤及其分子改变

E.人类肿瘤的基因组不稳定性

洪水：灾难

A．飓风：风沙

B．地震：死亡

C．火山：威胁

D．海啸：印尼

Internet上许多复杂网络和不同类型计算机之间能够互相通信的基础是( )。

A．XSL

B．ATM

C．Novell

D．TCP/IP

热电偶、热电阻都可以应用于测量介质的温度，但是热电阻可以用于测量管壁温度，热电偶不可以。