需分泌物查找滴虫有（） A.滴虫 * * 炎 B.外阴 * * 假丝酵母菌病 C.细菌性 * * 病

（浙江省余姚中学08-09学年上学期高三第一次质量检测，化学，18）可用于区别Na₂S、Na₂SO₃、Na₂SO₄、Na₂CO₃、Na₂SiO₃、Na₂S₂O₃六种溶液的一种试剂是

A．NaOH

B．盐酸

C．酚酞试液

D．BaCl₂

规范化理论对数据库设计有什么指导意义？

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.

3. 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

构造柱混凝土强度等级不应低于（）。

A.C10

B.C15

C.C20

D.C30

药用植物的引种驯化，就是通过人工培育，使野生植物变为家栽植物，使外地植物（包括国外药用植物）变为本地植物的过程。主要分（） 。