在煤与瓦斯突出煤层中掘进安全技术措施有哪些?

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问题:

在煤与瓦斯突出煤层中掘进安全技术措施有哪些?

考点:掘进工掘进工题库
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把一个棱长是6dm的正方体容器里面装满水,现将水倒入一个长0.8m,宽0.6m,高0.7m的玻璃缸中(容器及玻璃缸的厚度不计),水深是多少?

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下面哪项不是防尘工作八字方针中的内容()。

A.革

B.水

C.密

D.封

E.护

题型:问答题 简答题

以下关于表单控件基本功操作的叙述中,错误的是( )。

A.要在表单中复制某个控件,可以按住CTRI。键并拖放该控件

B.要使表单中被选定的多今控件大小一样,可单击“布局”工具栏中的“相同大小”按钮

C.要将某个控件的TAB序号为1,可以进入TAB键次序交互设置状态,双击控件的TAB键次序盒

D.要在“表单控件”中工具栏中显示某个类库文件中自定义类,可以单击工具栏中的“查看类”按钮。

题型:问答题 简答题

读写任务。

    阅读下面的短文,然后按照要求写一篇150词左右的英语短文。

      The three-and almost all other South Florida high school students-have to go outside of the classroom

to earn their diplomas (文凭), doing what schools call“community service”.

     Broward public schools require 40 hours to graduate. Palm Beach County public schools require 20,

and most private and charter schools (特许学校) require at least that much.

     The purpose: to give students a taste of the real world, and the chance to explore a career and create

a habit of volunteering.

     “We hope that when they finish high school they'll continue service,”says Mike Roland, student

activities officer for the Broward School District.

      About half of US public schools require community service, according to a national study. Broward

School Board (董事会) member Bob Parks says encouraging community service has launched all kinds

of new projects, including tutoring and food collections.

     Carroll, a junior student at South Plantation High School, has connected with FLIPANY, a nonprofit (非营利的) organization that offers cheap physical activity and food to lowincome families. He helps

teach children about cooking and healthy eating.

    “It has been a lifechanging experience,”says Carroll, who is now learning toward a career as a

sports trainer.“I want to find a career encouraging people to lead a healthier lifestyle.”

[写作内容]

1. 以约30词概括上文的主要内容。

2. 以约120词对短文所讲述的现象进行议论,内容包括:

(1)越来越多的人从事社区服务工作;

(2)社区服务工作的社会意义;

(3)作为学生,应该怎么做。

[写作要求]

1. 作文中可以使用亲身经历或虚构的故事,也可以参照阅读材料的内容,但不得直接引用原文中的句子;

2. 作文中不能出现真实姓名和学校名称。

[评分标准]

概括准确,语言规范,内容合适,语篇连贯。

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题型:问答题 简答题

钢筋混凝土梁要求满足条件验算该条件的目的在于()。

A.使梁不发生剪切破坏

B.增加混凝土的受压区面积

C.使构件不发生脆性破坏

D.充分发挥混凝土的作用

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