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 发布时间:2020-01-27 07:25 │ 来源:www.tikuol.com 题型:填空题 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。
题型:填空题 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 writeimportant 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 photosto 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 scienceproject 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 查看答案
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=1B.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DD.t1~t3间该反应的平衡常数均相同 查看答案
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.①③B.①②C.②③D.②④ 查看答案