关于小梁网，说法错误的是（） A.小梁网位于角巩膜缘区 B.小梁网切面呈三角形 C.

川乌的剧毒成分为

A．异喹啉类生物碱

B．双蒽酮苷类

C．双酯类生物碱

D．乌头多糖

E．胺醇类生物碱

方程x（x+3）=0的解是______．

温脾汤的功用是（）

A．攻下冷积，温补脾肾

B．荡涤肠胃，温补肾阳

C．攻下冷积，温补脾阳

D．攻下冷积，温肾暖胃

E．攻下冷积，温脾暖胃

阅读理解。

     All over the world people enjoy sports; sports help to keep people healthy and happy, and to live

longer.    

     Many people like to watch others play games. They buy tickets or turn on their TVs to watch the

games. Often they get very excited when "their" player or team wins.    

     Some sports are so interesting that people everywhere go in for(参加) them. Football, for example,

has spread(展开)around the world. Swimming is popular in all countries near the sea or in those with

many rivers. What fun it is to jump into a pool or lake, whether in China, Egypt or Italy! And think of

people in cold countries. Think how many love to skate or ski (滑雪) in Japan, Norway or Canada.      

     Some sports or games go back thousands of years, like running or jumping. Chinese wushu, for

example, has a very long history. But basketball and volleyball are rather new. Neither one is a hundred

years old yet. People are inventing new sports or games all the time. Water-skiing is one of the newest

in the family of sports.      

     People from different countries may not be able to understand each other, but after a game together

they often become good friends. Sports help to train(培养,训练) a person’s character(性格,品格).

One learns to fight hard but fight fair, to win without pride and to lose with grace(胜不骄,败不馁).

1. Why do people all over the world enjoy sports?    

A. Because they are healthy.    

B. Because they are happy.    

C. Because they want to live longer.    

D. All the above.

2. Why do some people get excited when they watch a game? Because________.           

A. their favourite team wins        

B. they win the game    

C. they get the good news            

D. they can’t help themselves  

3. Which of the sports has a long history?    

A. Water-skiing.        

B. Basketball.        

C. Volleyball.      

D. Long jump.  

4. Why do people from different countries often become friends after a game together?    Because            

A. they train their character in the game    

B. they understand each other    

C. they are friendly to each other    

D. they help each other

矿样粉碎全部通过一定的筛目，不允许将粗粒弃去，为什么？