下列实验室除杂(括号内为少量杂质)的方案正确的是() 提纯物质除杂试剂提纯方法A

题型:选择题

问题:

下列实验室除杂(括号内为少量杂质)的方案正确的是                                  (   )

 提纯物质除杂试剂提纯方法
A苯(苯酚)碳酸钠溶液过滤
BAl(Fe)氢氧化钠溶液过滤
CCO2(NO2洗气
D乙酸乙酯(乙醇)水洗、分液 

考点:物质的分离离子的检验粗盐的提纯
题型:选择题

王明上中学后认为自己已经长大,可以真正独立了。以下他的想法中,正确的是[ ]

A、真正独立的人在装扮上要标新立异,与众不同 

B、真正独立的人不会寻求他人的帮助  

C、真正独立的人要逐渐摆脱依赖,勇于为自己的行为负责

D、真正独立的人一定要“酷”

题型:选择题

竣工验收的组织者是()单位。

A.施工

B.设计

C.建设

D.质检

题型:选择题

It is not only experts in China who are arguing over whether women should work after marriage or not. Worldwide this question is being discussed as an interestingly large number of married women enter the workplace. Take the United States for example. Since 1960, the percentage of married women in the work force has jumped from 31.9 per cent to 59.4 per cent.

American women first moved into the paid labour force during the World War II, when men left their jobs to fight. In the last fifty years, more and more women have worked outside the home. And over these years of developing, Americans have changed their social values as a result. In 1975, women aged 35 and above made up half of all working women. And by 1980, 60 per cent were women at the age of 45 and above.

Now in Japan, women’s work group is M-shaped with middle-aged women and those aged 20-25 at the two peaks. According to statistics(统计), 37.7 per cent of Japanese women at childbearing age(25-29) still engaged themselves in work in 1980. and the number reached 50 per cent the next year.

Being a housewife has always been regarded as a “graceful occupation” in Japan. Some young Japanese women believe it is good to be a “ professional housewife”. However, old attitudes have been changing everywhere, and sometimes just out of economic necessary. In recent years, a great number of city housewives have poured out of homes to take part time jobs. Even the UN has given its support.. The 34th Congress of the United Nations in 1979 put forward the decision for formal agreement on the getting rid of discrimination(歧视) against women.

So far, most UN members have agreed on it, but some still haven’t,  including the United States.

小题1:From the first passage, we can learn that ________________.

A.experts encourage women to take paying jobs.

B.men encourage women to take paying jobs

C.government encourage women to take paying jobs.

D.more and more people begin to care about women’s life小题2:In the United States _________________.

A.married women are lazier than their husbands.

B.Husbands are lazier than their wives

C.Few married women used to work outside

D.More married women used to work outside小题3:Married women in Japan________________.

A, all work outside their homes     

B. seldom work outside their homes

C. have different opinions on their working outside 

D. all do housework at their homes

小题4:More and more women have taken jobs outside for the reason that ____________.

A.they have no children to take care of

B.they have no housework to do

C.they want to make more friends

D.they want to improve their living conditions

题型:选择题

(  )是全部教育活动的主题和灵魂,是教育的最高理想。

A.教育方针

B.教育政策

C.教育目的

D.教育目标

题型:选择题

某工程施工到2008年8月,经统计分析得知,已完工程际投资为1500万元,拟完工程计划投资为1300万元,已完工程计划投资为1200万元,则该工程此时进度偏差为( )万元。

A.100
B.-100
C.-200
D.-300

更多题库