监控系统计算机上功能扩展需经主管调度部门批准。

将抛物线y=2x²-3通过下列（　　）后得到抛物线y=2x²．

A．向下平移3个单位

B．向上平移3个单位

C．向下平移2个单位

D．向上平移2个单位

阅读理解。

     Proverbs are quite common in spoken English. We don't normally put them in a composition or a letter.

Sometimes it is helpful if you know what common proverbs mean. Here are a few examples.

     1) "Once bitten, twice shy." If a dog bites me, I shall be twice as careful in future when I see it. This

proverb is also used to apply to many things and not only to dogs. If you have been cheated at a shop, you

will not go the same shop again.

     2) "A bird in the hand is worth two in the bush." If I am a hunter, trying to catch birds, it is better to

catch one than to see two birds in a bush but not able to catch them. Thus this means that what you have

already got is better than the chance of being able to get something bigger in future.

     3) "Too many cooks spoil the broth (soup)". When too many people do something, they get in each other's

way and do a bad job.

     4) "To pour oil on troubled waters" is to try to calm things down. Oil is lighter than water. If a ship is in

trouble at sea, another ship may come to help it. The second ship can send small boats to rescue people.

However, it may first pour oil on the sea to make the sea less rough.

     5) "Don't be a dog in a manger( 槽 )" means " Don't be selfish." In a stable ( 马房 ), the manger is the

place where the horse's food is put. Sometimes a dog will sleep in the manger and bark when a horse comes

to get its food. The dog does want to eat the lay in the manger but it will not let the horse eat it.

     6) "He is sitting on the fence" means that somebody will not say whether he is in favor of a plan or against

it. He is sitting on a fence between two opposing sides, perhaps waiting to see which side will win.

     7) "He who pays the piper calls the tune." A piper is a musician. The man who employs or pays a musician

can say what tunes the man will play. Thus this means that if a man provides the money for a plan, he can say

how it will be carried out.

     8) "You can't get blood out of a stone" means that you cannot get something from a person who has not

got any of the things you want. e. g. you cannot get a million dollars from a poor man.

1. Peter has a bicycle which is much too small for him but he does not want to let his younger brother

    ride on it. His mother is angry and says to him: ______.

A. You can't get blood out of a stone

B. Don't be a dog in a manger

C. The early bird gets the worm

D. To pour oil on troubled waters

2. Mr. Wang paid for a new school. Some people didn't like the design of the school but they

    didn't argue with Mr. Wang because ______.

A. he was sitting on the fence

B. once bitten, twice shy

C. he who pays the piper calls the tune

D. a bird in the hand is worth two in the bush

3. Mrs. Lin wanted to buy a new dress. Her husband suggested that she buy it from a shop near their home.

    Mrs. Lin disagreed because she had been cheated by that shop. So she said: "I won't go there again

     because ______."　

A. a bird in the hand is worth two in the bush

B. I am sitting on the fence

C. once bitten, twice shy

D. too many cooks spoil the broth

4. Mr. Brown had quite a good job in Hong Kong but he thought that if he went to Singapore, he might

    get a much better job with more money and a larger house. His wife didn't want him to leave his job

     in Hong Kong and she reminded him that ______.

A. a bird in the hand is worth two in the bush

B. too many cooks spoil the broth

C. you can not get blood out of a stone

校园网在进行IP地址部署时，给某基层单位分配了一个C类地址块192.168.110.0/24，该单位的计算机数量分布如表17-2所示。要求各部门处于不同的网段，请将表17-3中的(7)～(14)处空缺的主机地址(或范围)和子网掩码填写在答题纸的相应位置。

柜员审核客户提交的有效证件时，对于客户提交的居民身份证，还须在（）系统中进行核查。

IRIS是指（）

A、国内铁路行业标准

B、国际铁路行业标准

C、企业标准