“白板说”

根据汉语或英文提示，结合句意，填上适当的单词。

1. He likes to go to the      (图书馆) to read books when he has free time.

2. I       (相信) you will surely be successful. So be confident of yourself.

3. Have you ever been       (出国)?

4. To reduce your _____(体重), you should eat less and do more exercise.

5. He is always _____(乐意的) to help people in trouble.

6. I think fights in some action film have a bad _____(影响) on teenagers.

7. My father is one of my _____(偶像). I hope to be a man like him.

8. Tomorrow is my grandma's _____(六十) birthday.

9. _____(lucky), I caught the last train.

10. It's _____(create) of you to design the wonderful poster.

11. At the        (begin), I felt it not easy to get on with him.

12. It's        (polite) to ask a woman about her age.

13. The Great wall attracts thousands of       (visit) every year.

14. He has made his _____(decide) to change his job.

15. I will have my computer _____(repair) tomorrow.

急性腹膜炎的病因中，不恰当的是（）。

A.绞窄性肠梗阻，细菌通过坏死肠壁进入腹腔

B.腹内脏器急性炎症扩散到腹腔

C.消化道穿孔，消化液进入腹腔

D.肺部的急性感染，细菌通过血流到达腹腔

E.女性泌尿系统感染，含有细菌的尿液渗入腹腔

酶加速化学反应的根本原因是

A．降低反应的活化能

B．减少活化分子数

C．改变酶本身的质和量

D．催化热力学上不能进行的反应

电缆沟开挖到多深应防止土层塌方？

下列属于矢量图特点的是（）

A.图像色彩丰富

B.由点阵组成

C.放大缩小不会失真

D.缩小会更清晰