试题与答案

机电硐室中敷设电缆时是否可以由门框或墙上直接出入?为什么?

题型:问答题 简答题

题目:

机电硐室中敷设电缆时是否可以由门框或墙上直接出入?为什么?

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0624/d56ac96608178e1b98ab38c560895536.html

下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D

试题推荐
题型:填空题

(13分)1 000 mL某待测液中除含有0.2 mol·L-1的Na外,还可能含有下列离子中的一种或多种:

现进行如下实验操作(每次实验所加试剂均过量):

(1)写出生成白色沉淀B的离子方程式:___________________________________。

(2)待测液中肯定不存在的阳离子是_________________。

(3)若无色气体D是单一气体:

①将阴离子的物质的量浓度填入下表中(一定不存在的填“0”,不能确定的填“?”):

②判断原溶液中K是否存在,若存在,求其物质的量浓度的最小值,若不存在,请说明理由:________________________________________________________________。

(4)若无色气体D是混合气体:

①待测液中一定含有的阴离子是____________________________。

②沉淀A中能与稀硝酸反应的成分是______________________________(写化学式)。

查看答案
题型:改错题

短文改错

In my family,there are three people,My father is

hardworking But goes to work in the field every day.        小题1:_______

He isn’t good at talk But he gets on well with other         小题2:_______

people. My mother is very much kind and is               小题3:_______

friendly to everyBody. So when I have the proBlem         小题4: _______

I will turn to her for help. My friends say I am clever.       小题5:_______

When the teacher asks us very difficulty questions,          小题6:_______

I’ll think quickly and stand to answer. At home my         小题7:_______

Father often thinks I’m silly. He said if I decide            小题8:_______

To do something, it takes him much times to stop me.        小题9:_______

This is how I need to improve in the future.                小题10:_______

查看答案
微信公众账号搜索答案