台湾有文字记载的历史可以追溯到公元前230年。

阅读理解。

     One day the students are having a painting lesson. Everyone begins to draw a picture. Xiao Ming is very free. When the bell rings for the break, Xiao Ming passes his picture to the teacher.

     The teacher looks at it and gets angry, "Why do you give me a piece of paper without anything on it, Xiao

Ming?" asks the teacher.

     "I'm sorry, sir. I draw a cat and some fish on the paper," says Xiao Ming.

     "Where's the cat and where's the fish?" asks the teacher again.

     "I draw some fish first. When I finish drawing the cat, she eats up (吃光) the fish. When I give it to you,

she runs away," answers Xiao Ming.

1. Xiao Ming is a ____.

A. teacher

B. student

C. worker

D. farmer

2. The students are busy ____.

A. reading

B. writing

C. drawing

D. talking

3. The teacher is very ____ when he sees Xiao Ming's picture.

A. angry

B. happy

C. sorry

D. well

4. Xiao Ming's picture is very ____.

A. good

B. nice

C. dear

D. bad

5. Xiao Ming's explanation (解释) will make his classmates ____.

A. laugh

B. run away

C. cry

D. get angry

华法林的特点是：

A．口服无效

B．作用持续时间较长

C．起效快

D．体内外均有效

E．血浆蛋白结合率较低

信号是指示列车运行及调车作业的命令，有关行车人员必须严格执行。（）

在研究年龄对急性心肌梗死预后的影响中，怀疑性别和心肌梗死部分可能是混杂因素，因此，只选择男性的前壁心肌梗死患者进行研究，这种控制混杂偏倚的方法为（）。

A.限制

B.匹配

C.随机化抽样

D.多因素分析方法

E.盲法收集

分段绝缘器的组装要正确，各部件的连接需牢固与接触网在一个平面内，且与（）平行。各接头需平滑顺直，不得有拉弧现象。