试题与答案

一辆汽车行驶到半径为R的圆弧形凸形桥最高点,已知汽车此时速度大小v0,为,汽车质

题型:填空题

题目:

一辆汽车行驶到半径为R的圆弧形凸形桥最高点,已知汽车此时速度大小v0,为,汽车质量为m,重力加速度为g,则汽车在凸形桥最高点受到的桥面支持力是______.

答案:

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参考答案:A

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题型:阅读理解
根据材料内容选择最佳答案,将其标号填入题前括号内。
    The following form shows the result of a survey of parents from five countries who were asked why children
are important to them, and they were asked to choose three main reasons from seven. For example, the three
most important reasons for Japanese parents are Item4- strengthening (加强) family (51%), Item5-developing
oneself through raising one's children (60%), and Item 7-raising responsible citizens (抚养有责任心的公民)
(45%).
Items (项目)
Japan
(%)
Korea
(%)
USA
(%)
Britain
(%)
France
(%)
1)To see oneself going on in future
35
31
32
17
59
2)To keep the family line
24
68
28
17
26
3)To receive care in old age
10
38
8
7
8
4)To strengthen family ties
51
25
50
55
66
5)To develop oneself through raising one's children
60
19
54
69
35
6)To enjoy raising children
20
19
50
71
39
7)To raise responsible citizens
45
40
46
28
15
1. Among all the countries, only             think that keeping the family line is their most important reason for
   raising children.
[ ]
A. Americans
B. Frenchmen
C. Japanese
D. Koreans
2. Which reason is thought to be the least important by the parents of most countries?
[ ]
A. Item 3
B. Item 2
C. Item 6
D. Item 7
3. Which item do the most countries think is one of their main reasons?
[ ]
A. Item1
B. Item5
C. Item4
D. Item6
4. Which two countries have the same three main reasons for raising children?
[ ]
A. Japan and Korea
B. America and Britain
C. Britain and Korea
D. Japan and America
5. In which country do most people enjoy raising children?
[ ]
A. In Japan
B. In the USA
C. In Britain
D. In France
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题型:问答题

某管道安装工程项目,该管道工程属于超高层建筑管道工程,由于施工项目经理部严格执行超高层建筑管道施工的技术要点,使得工程进展非常顺利,施工质量达到各项要求。
管道安装完毕后,对其进行了系统试验,试验时的有关实施过程如下:
(1)采用闪点为40℃的可燃液体介质对管道进行液压试验。
(2)在进行液压试验时其环境温度为2℃。
(3)在进行气压试验时,承受内压钢管的试验压力为设计压力的2.15倍。
(4)泄漏性试验合格后进行真空试验。
问题1.超高层建筑管道工程的施工技术要点有哪些
2.逐条判断关于管道试验实施过程是否正确如不正确,请改正。
3.简要说明真空度试验的实施要点
4.输送何种物质的管道必须进行泄漏试验
5.管道泄漏性试验应重点检验的项目有哪些
6.管道泄漏性试验时对试验介质和试验压力有何规定

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