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问题 单项选择题

连带责任保证的保证人与债权人未约定保证期间的，债权人有权自主债务履行期届满之日起（）内要求保证人承担保证责任。

A.3个月

B.6个月

C.90天

D.120天

答案

参考答案：B

单项选择题

Ravi, like many project (1) , had studied the waterfall model of software development as the primary software life-cycle (2) . He was all set to use it for an upcoming project, his first assignment. However, Ravi found that the waterfall model could not be used because the customer wanted the software delivered in stages, something that implied that the system had to be delivered and built in (3) and not as (4) .

The situation in many other projects is not very different. The real world rarely presents a problem in which a standard process, or the process used in a previous project, is the best choice. To be the most suitable, an existing process must be (5) to the new problem.

A development process, even after tailoring, generally cannot handle change requests. To accommodate change requests without losing control of the project, you must supplement the development process with a requirement change management process.

（1）处填（）。

A．customers

B．managers

C．users

D．administrators
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问答题

某路桥工程公司，承接了一座跨河桥梁的施工任务，基础采用10根

2.2m的桩基，施工中采用沉入桩的施工方法进行施工，在桩的吊装过程中采用三个吊点进行起吊，由于水下地质条件的不同，施工单位拟分别采用射水沉桩和静力压桩进行施工。

在射水沉桩时的部分施工工序为：

(1)桩下沉15m后，解下吊桩钢丝绳，减慢进桩速度。

(2)桩下沉至设计标高3m时，停止射水，拔出射水管。

问题

静力压桩的施工要点有哪些
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