通常APRA开机时，会自动执行APRA测试。当各灯和数码管（）时，表示功能不正常。

当显微镜被弄脏时，正确的擦拭方法是：（　　）

A．用手指擦拭

B．用抹布擦拭

C．用水冲洗

D．用擦镜纸轻轻擦拭

纳米：长度

A．后天：时间

B．音色：音乐

C．销售人员：销售渠道

D．公亩：面积

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(炽热的,暴躁的) 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 in stomach 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 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 words about a color,such as brown

关于产品寿命周期成本的控制，说法错误的是（）。

A.产品寿命周期成本包括产品的购买成本和运行维护成本两部分

B.产品质量高，可以延长产品的使用周期，降低产品的维修成本，从而降低产品的寿命周期成本

C.产品寿命周期成本的控制要求维修成本的节约必须小于购买成本的提高

D.维修成本和购买成本的变动应以降低总的产品寿命周期成本为目标

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