与30mL 1mol/L的MgCl2溶液中Cl-浓度相同的是 ( ) A.150

题型:选择题

问题:

与30mL 1mol/L的MgCl2溶液中Cl浓度相同的是 ( )

A.150mL 0.2mol/L FeCl2溶液

B.90mL 2mol/L NaCl溶液

C.60mL 1mol/LAlCl3溶液

D.30mL 0.5mol/L CaCl2溶液

考点:物质的量
题型:选择题

短文改错。

     下面短文中共有10处语言错误,请在有错误的地方增加、删除或修改某个单词。

增加:在缺词处加一个漏字符号(A),并在其下面写上该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下画一横线,并在该词下面写上修改后的词。

注意:1. 每处错误及其修改均仅限一词;

          2. 只允许修改10处,多者(从第1I处起)不计分。

     During the summer holidays this year, I thought I should do anything meaningful instead

of staying at home, so I have got a job at a KFC fast food restaurant, worked there as a cleaner.

 I worked seven hours a day for three weeks.

     The job was hard and bored and seemed endless, which made me so tired that I nearly gave

it in half way, but I stuck to it with determinations. Every day I started off for work early in the

morning and got honle lately in the evening. Finally I finished the job before the new tem begins.

Now, I understand that labor means. I think it is really successful experience.

_____________________________________________________________________________

_____________________________________________________________________________

题型:选择题

如图是心脏工作示意图,请据图回答:

(1)图A所示的心房处于______状态,而心室处于______状态.

(2)图B所示的心房处于______状态,而心室处于______状态.

(3)图C所示的心脏处于______状态.

题型:选择题

右图是世界史上某一重大事件示意图,以下对此事件解读不正确的是()

A.促进了欧洲资本主义的发展

B.给非洲带来了巨大的灾难

C.给美洲提供了大批劳动力

D.最先进行奴隶贸易的是西班牙人

题型:选择题

主题策划的具体策划的具体原则是()。

A.会展主题的可持续性

B.定位准确

C.会展主题的可参与性

D.时效性

题型:选择题

可编程序控制器中的CPU要求完成()、()、准备取()及()都有很大关系。

更多题库