检修时,所挂主接地线的截面积不得小于()mm2。防感应电所使用的个人保安线的截面积不

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问题:

检修时,所挂主接地线的截面积不得小于()mm2。防感应电所使用的个人保安线的截面积不得小于()mm2

考点:输电线路检修考试输电线路检修考试题库
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阅读短文,根据短文内容,从短文后的五个选项中,选出能填入空白处的最佳选项。选项中有一项为多余选项。
     Do you have enongh time to do all the things you have to do and want to do? 1.              ?
     A Monthly Calendar is a great way to remember important dates. By seeing a whole month at once,
you can get a good sense(感觉)of what's coming up.
     2.               
    First, make one for your wall or desk, with really big daily squares(正方形)where you can write
important dates, Get in the habit of writing every important event, from school project dates to meetings
and sports games. 3.             . so they'll catch your eyes. Try using colored markers, or magazine photos
to make the calendar areas pop out(突出).
     Then mark"warming (警告) dates"for really important events. For example, if you have a big science
project due(到期)on a certain day , don't just mark that day. Count back a week, and then mark that
calendar square with "One week until science project due!" This can he especially helpful. If you make
some warning squares. 4.             .
 
   A. things won't be forgotten
   B. Make important dates as clear as possible
   C. Here's how to make a Monthly Calendar
   D. we all have a Monthly Calendar
   E. How could you manage your time better
题型:填空题

一定温度下,将1molA(g)和1molB(g)充入2 L密闭容器中发生反应,在t1时达到平衡:A(g)+B(g)xC(g)+D(s)。在t2、t3时刻分别改变反应的一个条件(温度、体积、催化剂或一种物质),测得容器中C(g)的浓度随时间变化如图所示。有关说法正确的是

(      ) 

A.反应方程式中x=1

B.t2时刻改变的条件是使用催化剂

C.t3时刻改变的条件是移去少量D

D.t1~t3间该反应的平衡常数均相同

题型:填空题

2012年CPI指数经常登上报纸的头版头条。CPI即消费物价指数,是反映与居民生活有关的产品及劳务价格统计出来的物价变动指标,通常作为观察通货膨胀水平的重要指标。一般来说,当CPI>3%的增幅时就是通货膨胀;而当CPI>5%的增幅时就是严重的通货膨胀。该指数升幅过高往往不被市场欢迎的原因是

①物价不断上涨,造成经济不稳定

②央行增加纸币发行,造成纸币供应紧张

③生活成本提高,币值便随之下降

④生活成本降低,币值随之上升

A.①③

B.①②

C.②③

D.②④

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一些创业者因心理障碍,不能悦纳自己,常常怀疑自己的能力,意志薄弱。这种心理障碍的表现被称为()

A.依赖性强

B.自卑

C.自恋性人格

D.畏缩性人格

题型:填空题

某水泵出口有一段直管,长L为30m,管子内径d为0.15m,阻力系数λ为0.04,计算当流速V为2m/s(这时流量是30L/s)时的管道阻力。

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