两根拉杆的材料、横截面积和受力均相同,而一杆的长度为另一杆长度的两倍。试比较它们的轴

题型:单项选择题

问题:

两根拉杆的材料、横截面积和受力均相同,而一杆的长度为另一杆长度的两倍。试比较它们的轴力、横截面上的正应力、轴向正应变和轴向变形。下面的答案哪个正确()。

A.两杆的轴力、正应力、正应变和轴向变形都相同

B.两杆的轴力、正应力相同,而长杆的正应变和轴向变形较短杆的大

C.两杆的轴力、正应力和正应变都相同,而长杆的轴向变形较短杆的大

D.两杆的轴力相同,而长杆的正应力、正应变和轴向变形都较短杆的大

考点:工程地质工程力学工程力学题库
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女性,18岁,农民,3年来反复咳嗽,大量咳痰,1周前少量咯血,2天前出现高热住院

哪项检查可帮助明确诊断()

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C.胸部高分辨CT检查

D.痰培养

E.胸部B超

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A.健康信息不属于卫生资源

B.指有关人的健康的知识

C.指有关人的健康的技术

D.指有关人的健康的行为模式

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Developing reliable software on time and within () represents a difficult endeavor for many organizations. Usually business solutions have three main aspects: people, () , and technology. The main reason for failing software projects has little to do with technology and tools, and much to do with lack of process () . Experience has shown that introducing new technology and tools in an immature or undisciplined environment is likely to increase the chaos. CASE tools are not enough. “A fool with a tool is still a fool!” Structured method was the first wave of the software industry. This was the beginning of transforming software development from a “ () industry” to mass production. Software process movement is the second wave in the software industry. The process maturity movement prepares the way for the third wave of the software industry: “software industrialization”.Software development will become like an assembly and manufacturing process. A critical enabling factor is a disciplined software engineering process with predictable quality, () and functionality.

people, () , and technology.

A.process

B.skill

C.organization

D. interface

题型:单项选择题

2006年2月21日,中 * * 政治局召开会议指出,要大力实施科教兴国战略,把加快科技发展放在更加突出的战略地位。我们之所以要大力实施科教兴国战略,是因为       

A.经济发展是文化教育发展的基础

B.文化是社会现实的反映

C.在经济发展中,科学技术的作用越来越突出

D.人们在社会实践中感受文化

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压缩机在运转中必须注意哪些事项?

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