背景：

某综合商务大厦为框架—剪力墙结构，是一座现代化的智能型建筑，设计使用年限50年。该箭镞地下3层，地上28层，建筑面积5.8 万平方米。该工程2007年8月10日主题结构验收合格，2008年3月20日施工单位提交竣工验收报告，2008 年4月2日竣工验收合格。

问题：

1、 该工程建设工程承包单位应何时提交质量保修书?

2、 该工程质量保修书应明确哪些内容?在正常使用条件下，建设工程的最低保修年限为多少?

3、 写出本单位工程各分项的保修期具体起止日期?

Passage 2

Questions 6 to 10 are based on the following passage:

In order to learn to be one’s true self, it is necessary to obtain a wide and extensive knowledge of what has been said and done in the world; critically to inquire into it; carefully to consider it; clearly to analyze it; and earnestly to carry it out.

It matters not what you learn, but when you once learn a thing, you must never give it up until you have mastered it. It matters not what you inquire into, but when you once inquire into a thing, you must never give it up until you have thoroughly understood it. It matters not what you try to think out, but when you once try to think out a thing, you must never give it up until you have got what you want. It matters not what you try to carry out, but when you once carry out a thing, you must never give it up until you have don’t it thoroughly and well.

If another man succeeds by one effort, you will use a hundred efforts. If another man succeeds by ten efforts, you will use a thousand.

6. According to the author, first of all one must .

A. analyze B. inquire C. obtain knowledge D. act

7. According to the author, .

A. learning is not important B. thinking is not necessary

C. knowledge means little D. it is not important what we learn

8. The end of learning should be .

A. thought B. mastery C. inquiry D. analysis

9. According to the author, another man’s success should .

A. make greater efforts B. make us nervous

C. not be taken into consideration D. cause one to stop trying

10. The author implies but does not say what .

A. the way to knowledge is through specialization

B. one has to know everything to be successful

C. success depends not so much on natural ability as it does on effort

D. success in one’s profession is latest important in one’s life

梁段上的主要力有____和_____。

按事故成因划分，事故可分为______ 和 ______ 两大类。

已知管道试验压力 1.0MPa，采用石棉水泥接口，最大承受摩擦力100KN/m，(k=0.8 )，求 DN900X800丁子支墩的外推力