问题 问答题

现有两杯无色透明的液体,请你使用实验室中的基本实验器材,用实验的方法比较它们密度的大小.要求语言简洁、方法两种.

答案

(任意选择两种方法)

方法一:往两烧杯中分别倒入等高(等体积)的不同种液体,再将两烧杯放在天平左右两托盘上,观察横梁,下沉的一端杯中液体的密度大.

方法二:分别向两杯中倒入适量的两种液体,将它们放到天平两托盘上,调节杯中液体的量,直到天平的横梁平衡为止,比较两杯液体液面高度,液面较高的液体密度较小.

方法三:将小木块分别放入两种液体中,比较木块露出液面的体积,木块露出液面体积较大的那杯液体的密度也较大.

方法四:用弹簧测力计测出小石块的重力,然后把小石块分别浸没在两种液体中称,弹簧测力计示数变化较大的那杯液体密度较大.

故答案为:方法一用量筒测出相同体积的两种液体放人相同的容器中,然后放在已调好的天平的托盘中观察,下沉的一侧液体密度大.

方法二将两个相同的烧杯放在已调好的天平的托盘上,倒入等质量的两种液体观察,体积小的液体密度大.

阅读理解

阅读理解。

     The more women and minorities make their way into the ranks of management, the more

they seem to want to talk about things formerly judged to be best left unsaid.

     Consider the novel views on the subject of getting ahead.Coleman is black.He spent 11

years with IBM, half of them working in management development, and now serves as a

consultant to the likes of AT & T, Coca Cola.Coleman says that based on what he's seen at

big companies, he weighs the different elements that make for long term career success as

follows: performance counts a mere 10%; image,30%; and exposure, a full 60%.Coleman

concludes that excellent job performance is so common these days that while doing your work

well may win you pay increases, it won't secure you the big promotion.He finds that advancement

more often depends on how many people know you and your work, and how high up they are.

     Ridiculous beliefs? Not to many people, especially many women and members of minority races

who, like Coleman, feel that the scales have dropped from their eyes."Women and blacks in

organizations work under false beliefs," says Kaleen Jamison, a New York based management

consultant who helps corporations deal with these issues."They think that if you work hard, you'll get

ahead and someone in authority will reach down and give you a promotion." She added, "Most women

and blacks are so frightened that people will think they've gotten ahead because of their sex or color

that they play down their visibility." Her advice to those folks: learn the ways that white males have

traditionally used to find their way into the spotlight.

1.The best title for this passage would be________.

A.The Importance of Being Visible

B.Roles of Women and Minorities in Management

C.Job Performance and Advancement

D.Sex and Career Success

2.To achieve success in your career,the most important factor, according to the passage, is to_______.

A.work as a consultant to your superiors

B.project a favorable image to the people around you

C.let your superiors know how good you are

D.perform well your tasks given by your superiors

3.The reason why women and blacks play down their visibility is that they________.

A.know that someone in authority will reach down and give them a promotion

B.don't want people to think that their promotions are due to sex or color

C.don't want to give people the impression that they work under false beliefs

D.believe they can get promoted by reason of their sex or color

4.In the author's opinion, Coleman's beliefs are________.

A.biased  

B.popular

C.superficial  

D.insightful

配伍题 B型题