等高线具有哪些主要特点？

Dear Tom

How are you? I'm at a new school this term. And I'm writing to you about my school now. My new school is big and nice. There are one thousand and four hundred students and one hundred and forty teachers at my school. I like the teachers. They are very kind to me. My classmates are very friendly, too. They teach me Chinese and I teach them English.

There are trees, flowers and green grass at my school. They are very beautiful. Behind my school there is a small river. The water in it is quite clean. We can swim in it.

We have no classes on Saturdays or Sundays. Sometimes I go to play football or basketball with my classmates. Sometimes I stay at home and watch TV. Sometimes I go to shops with my father and mother. We all like China.

Please write to me soon!

Yours

Jack

小题1:Jack is at a/an ________ school.

A．English

B．Chinese

C．small

D．Japanese小题2:There are ________ students and ________ teachers at Jack's school.

A．1,400; 104

B．1, 040; 104

C．1,400; 140

D．1, 040; 140小题3:Jack's teachers ________.

A．teach him English very well

B．only teach him Chinese and English

C．don't like him at all

D．are quite good to him小题4:Jack ________ his new classmates.

A．doesn't get on well with

B．doesn't like

C．makes good friends with

D．is going to learn English from小题5:Which is TRUE?

A．Jack goes to school every day.

B．Jack doesn't have classes every day.

C．Jack has no classes only on Saturdays.

D．Jack has no classes only on Sundays.

下述功能都是企业MIS的重要功能的组成部分，( )是其最基本的功能。 Ⅰ．监测企业运行情况 Ⅱ．预测企业未来 Ⅲ．控制企业行为 Ⅳ．支持企业决策

A．Ⅰ和Ⅱ

B．Ⅱ和Ⅲ

C．Ⅰ和Ⅲ

D．Ⅲ和Ⅳ

(1) 将考生文件夹下GUN＼TAR文件夹中的文件FEN．HEN删除。 (2) 在考生文件夹下WATER＼ICE文什夹中建立一个新文件夹MOUNT。 (3) 将考生文件夹下PEAK＼RODE文件夹中的文件JUICE.HLP移动到考生文件夹下 YUMON文件夹中，并将该文件改名为SOUP.DLL。 (4) 将考生文件夹下DANG文件夹中的文件CHANGE.OPU复制到考生文件夹下LION文件夹中。 (5) 将考生文件夹下BELIVER＼NODE文件夹中的文件GUMBLE.BAS更名为 WALKER.FOR。

鼠标器与主机的接口有多种，下面哪一种接口不会用作鼠标器与主机的接口

A．RS-232

B．PS/2

C．USB

D．IEEE-1394

未设调车组的中间站手推调车时，须取得（）的同意。