期货合约是标准化合约，其唯一的变量是标的商品的品种

阅读理解。

     Many people in the world have not seen snow. Some countries never have snow; some have only a

little on top of the high mountains. In the north of England, there is quite a lot of snow every winter, but in

the south of England, there is usually little.

     When a student from a warm country comes to England in autumn for the first time, he feels cold at

first. There are often clouds, grey sky and cold rain in England in autumn, and most students from warm

countries do not like this.

     But snow is different. It is beautiful. Perhaps, after several mornings, the student wakes up one day,

and there is a lot of light in his room. He thinks, "Is it so late?" and jumps out of bed. But no, it is not very

 late. He looks out of the window and there is snow on the ground and on the houses and everywhere.

1. In the ________ of England there is little snow in winter.

A. east    

B. west    

C. south    

D. north

2. In the autumn of England, we can not often see ________.

A. cold rain   

B. grey sky  

C. dark clouds    

D. all of the above

3. Snow is ________.

A. beautiful    

B. dark    

C. warm    

D. happy

4. The sentence "Is it so late?" means ________.

A. it's very late    

B. he wants to go to school

C. he wants to catch a bus    

D. he usually gets up early

5. Which of the following is true?

A. Everyone in the world has seen snow.

B. It often sunny in the south of England.

C. Foreign students like the weather in England.

D. The light of the room comes from clean, beautiful snow.

温病后期，夜热早凉，热退无汗，舌红少苔，脉细数者，治宜选用（）

A.秦艽鳖甲散

B.青蒿鳖甲汤

C.当归六黄汤

D.清营汤

E.清骨散

风缆绳式火炬、排气筒，简体底部固定在混凝土基座上，用（）根缆绳固定。

A．4

B．8

C．6

D．10

【问题3】
有时不能联网。
故障现象：ADSL有时不能正常上网。

在一棵二叉树上，度为零的接点的个数为N₀，度为2的结点的个数为N₂，则N₀＝（）

A．N₂+1

B．N₂

C．N₂-1

D．N₂/2