已知集合A={x|x为不超过4的自然数}，用列举法表示A=______．

A．物质HClO₄的氧化性大于HClO₃的氧化性

B．若化学计量数a=8，b=3，则8 mol氯酸分解转移电子数为20N_A

C．变蓝的淀粉碘化钾试纸褪色可能是发生反应：4Cl₂+I₂+ 6H₂O=12H⁺+8Cl^-+2IO₃^-

D．氯酸分解所得O₂和Cl₂的物质的量之比是确定不变的

关于内存变量的调用，下列说法正确的是( )。

A．私有变量只能被本层模块程序调用

B．私有变量能被本层模块和下层模块程序调用

C．局部变量不能被本层模块程序调用

D．局部变量能被本层模块和下层模块程序调用

阅读理解。

     Every people has their own way of saying things, their own special expressions. Many everyday

American expressions are based on colors.

     Red is a hot color. Americans often use it to express heat. They may say they are red hot about

something unfair.When they are red hot they are very angry about something.The small hot tasting peppers found in many Mexican foods are called red hots for their color and their fiery taste. Fast loud music is

popular with many people. They may say the music is red hot, especially the kind called Dixieland jazz.

     Pink is a lighter kind of red. People sometimes say they are in the pink when they are in good health.

The expression was first used in America at the beginning of the twentieth century. It probably comes from the fact that many babies are born with a nice pink color that shows that they are in good health.

     Blue is a cool color. The traditional blues music in the United States is the opposite of red hot music.

Blues is slow, sad and soulful. Duke Ellington and his orchestra recorded a famous song-Mood Indigo-

about the deep blue color, indigo.In the words of the song:" You aren't blue till you've had that Mood

Indigo". Someone who is blue is very sad.

     The color green is natural for trees and grass. But it is an unnatural color for humans. A person who has a sick feeling－stomachache may say she feels a little green. A passenger on a boat who is feeling very

sick from high waves may look very green.

     Sometimes a person may be upset because he does not have something as nice as a friend has, like a

fast new car. That person may say he is green with envy. Some people are green with envy because a

friend has more dollars or greenbacks. Dollars are called greenbacks because that is the color of the back side of the paper money.

     The color black is used often in expressions. People describe a day in which everything goes wrong as a black day. The date of a major tragedy is remembered as a black day. A blacklist is illegal now.But at

one time, some businesses refused to employ people who were on a blacklist for belonging to unpopular organizations.

1. If you had your wallet stolen while doing some shopping,you may call it _____.

A. a white day  

B. a black day

C. a red day  

D. a green day

2. Suppose a Mr.Brown says he is very happy because his three children are all in the pink, this means all his children are _____.

A. lucky and wealthy  

B. gentle and modest

C. fit and healthy 

D. creative and energetic

3. When she got home and found nothing had been done by her husband, Jane was really _____.

A. red hot  

B. green  

C. blue  

D. black

4. In the following paragraph,the writer might tell the reader something about _____.

A. unpopular organizations in the world

B. people's response towards a black day

C. the influence of the traditional blues

D. more expressions based on colors, such as brown

宋朝的“诚信状元”，后成为宰相的是（）

A、赵匡胤

B、秦桧

C、岳飞

D、王拱辰