问题 选择题

两个完全相同的圆柱形容器内分别盛有质量相等的水,现将质量相等的实心铜球和铝球(ρ>ρ)分别浸没在甲、乙两个容器中,且均无水溢出,这时两个容器底部所受水的压力F、F和压强p、p的关系正确的是(  )

A.F>F  p>p 

B.F=F  p<p

C.F<F  p<p

D.F=F  p>p

答案

因为m相同、ρ>ρ

所以V<V

又因为两球都浸没,

所以V铜排<V铝排

所以h<h

由公式p=ρgh知,

p<p

由公式F=pS知,

F<F

故选C.

阅读理解
阅读下列短文,根据短文内容填写表格。(每空限填一词)
Some people believe that your nationality can influence your personality. This is why you might hear someone saying “She is a typical(典型的) Australian” or “He is so French”. It seems that people from a certain country share certain similar characteristics.
French
French people are often seen as romantic and outgoing people with a great love for life, food and wine. They are good at singing and dancing.
Chinese
Chinese are friendly people who are hard-working. They are polite because they are careful about “saving face” when dealing with other people.
Australians
Australians are merry people who spend a lot of time outdoors. They enjoy a slower life. They laugh a lot but sometimes people think they are loud and rude.
Germans
Germans are often described as being serious and careful. They are hard workers and pay a lot of attention to details. However, sometimes people say Germans have no sense of humour.
All these national types can be true for some people, but very wrong for others. For example, you might meet a German who is a confident singer with a great sense of humour, or an Australian who is shy and quiet!
Personalities and Nationalities
Opinion
People from a certain country小题1:certain similar characteristics
Examples
French
Romantic and小题2:
Love life, food and wine
Good singers and小题3:
小题4:
Friendly, hard-working and polite
Careful about “小题5:face” before others.
Australians
Like to stay小题6:, enjoy a slower life.
小题7:a lot.
Merry, sometimes loud and rude.
Germans
Pay attention to小题8:.
Serious and careful, not小题9:.
Conclusion
Nationalities may小题10:personalities, but not for all!
 
单项选择题