问题 问答题

一块0℃的冰浮在0℃的水中,它露出水面的体积是200分米3,则它在水下的体积是多少?

答案

因为冰漂浮在0℃的水中,所以重力G=F

根据阿基米德原理F=GgV和G=mg=ρVg,

所以ρVg=ρgV

V
V
=
ρ
ρ
=
0.9×103kg/m3
1.0×103kg/m3
=
9
10

V
V+V
=
9
10

∴V=9V=9×200dm3=1800dm3

故答案为:它在水下的体积是1800dm3

阅读理解

You want to know about my staying in America, right? Well, to tell you the truth, it is really an eye-opening experience to study here.

In China, I had English classes five times a week since fifth grade. However, I didn’t know how different textbook English could be from everyday English until I came to Hotchkiss School, Connecticut.

When I first studied English, I was told to say,” I am fine” when people say “How are you?” But in the US, I found that people say, “I am good” or “I’m tired”.

One day, someone greeted me with “What’s up?” It made me confused . I thought for a moment and then smiled because I didn’t know what to say.

Since then, I have discovered more and more differences between Chinese and US cultures.

To my surprise, US girls spend a lot of time in the burning sun to get a tan(晒黑). However, in China, girls try every possible way to get their skin paler, or “whiter”.

I was also surprised by how hardworking US students are.  In China, schoolwork is almost everything, so we study hard and that’s it. But here, a “good” student gets good grades, does a lot for the public and plays sports or music.

The kids here are so talented, I am starting to be sorry that I gave up playing the piano at an early age and that I have never thought about sports.

小题1: What does the word “confused” in the fourth paragraph mean in Chinese ?

A.困惑

B.憧憬

C.悲痛

D.后悔小题2:A good US student spends his / her time ______ .

A.only in doing homework

B.on studies, sports or music and public work

C.only in working for the public

D.only on sports or music小题3:Which of the following is NOT true ?

A.The writer is now in US.

B.American girls love to have white skin.

C.US students are talented and hard working.

D.The writer regrets that he gave up playing the piano.

单项选择题