关于先天性无 * * ，以下描述哪项正确（） A.为双侧中肾管发育异常造成 B.多合并

某工程项目，经有关部门批准采取公开招标的方式确定了中标单位并签订合同。
该工程合同条款中部分规定如下：
(1)由于设计未完成，承包范围内待实施的工程虽然性质明确，但工程量还难以确定，双方商定拟采用总价合同形式签订施工合同，以减少双方的风险。
(2)施工单位按建设单位代表批准的施工组织设计(或施工方案)组织施工，施工单位不承担因此引起的工期延误和费用增加的责任。
(3)建设单位向施工单位提供场地的工程地质和地下主要管网线路资料，供施工单位参考使用。
(4)施工单位不能将工程转包，但允许分包，也允许分包单位将分包的工程再次分包给其他施工单位。
在施工招标文件中，按工期定额计算，该工程工期为573天。但在施工合同中，双方约定：开工日期为2007年12月15日，竣工日期为2009年7月25日，日历天数为586天。
在工程实际实施过程中，出现了下列情况：
工程进行到第6个月时，国务院有关部门发出通知，指令压缩国家基建投资，要求某些建
设项目暂停施工。该工程项目属于指令停工下马项目，因此，业主向承包商提出暂时中止合同实施的通知。承包商按要求暂停施工。
复工后在工程后期，工地遭遇当地百年罕见的台风的袭击，工程被迫暂停施工，部分已完工程受损，现场场地遭到破坏，最终使工期拖延了2个月。
[问题]

该工程合同条款中约定采用的总价合同形式是否恰当并说明原因。

阅读理解。

     This is the times of information technology. Pakistan (巴基斯坦) is also trying to keep up with this IT

development and special steps are being taken to spread the Internet all over the country.

     This is considered as a great achievement and it is. But here is a question whether our people know the

use of the Internet for development purpose. It is a fact that the ratio (比率) of informative and educational

sites is very low.

     What do many of them do in Pakistan when people surf the Internet? They use it mostly for entertainment.

Many students spend a lot of time and money in surfing the Internet. They do chatting or visit other

entertainment sites. It is surprising to read that boys and girls go to the Internet cafes and spend many hours

daily in just chatting. just join any Pakistani chat room at any site, and you will know that what is the level

(水平) of language and which type of language mostly our people use in chatting. The number of the web

addicts in our country is increasing day by day.

     It is also a fact that many people including teenagers visit sites unsuitable. One can imagine that they are

becoming worse and they are becoming addicted to such things that are very harmful (有害的) to them. They

are taking all the disadvantages from the Internet.

     Students do use the Internet for education purpose. But there are also several disadvantages. Students

normally surf more on the Internet than teachers. It happens several times that a teacher gives some work

to students and they get it from the Internet, copy it and present it to the teacher, who many times is unable

to know what is copied from the Internet. In this way students are giving up the habit of reading books. They

just open sites, copy the information and finish the homework that they do not even read. However, a very

good advantage of the Internet for students is that those who want to seek knowledge can get information

very quickly and read many books by famous foreign authors which are very expensive to buy.

     The Internet itself is a very useful and important tool of development nowadays, but it is really sad that in

Pakistan people are mostly misusing it. Those who use it for development purpose are still very few.

1. What is the article mainly about?

A. The development of IT in Pakistan.

B. The very useful and important tool in Pakistan.

C. The worrying situation of using the Internet in Pakistan.

D. The advantages and disadvantages of the Internet in Pakistan.

2. What do the underlined words "web addicts" in paragraph 3 mean?

A. Students whose level of language in chatting is very low.

B. People who are not able to free themselves from the Internet.

C. Entertainment sites of the Internet which are harmful to teenagers.

D. Internet cafes where boys and girls spend too much time in chatting.

3. The writer's purpose in writing this article is ______ in Pakistan.

A. to encourage readers to keep up with the IT development

B. to advise readers to use proper language in chatting rooms

C. to ask readers to pay attention to the problem in using the Internet

D. to stop readers from going to the Internet cafes or misusing the Internet

一般情况下，高层民用建筑之间的防火间距不应小于（）m。

A．6 

B．9 

C．10 

D．13

调频接收机中限幅器的作用是降低音量。

塔检查时，塔盘上阀孔直径冲蚀后，其孔径增大值不大于（）。

A、4mm

B、3mm

C、2mm

D、1mm