问题 单项选择题

在甲、乙、丙、丁四个相同的容器中,分别盛有水、盐水、酒精和水银四种液体,把四块质量相同、外形不同的冰块分别放入四个容器中,此时液面高度相同,当冰块融化后,下列叙述正确的是( )。

A.水面高度不变,其他液面都升高
B.酒精液面降低,水面高度不变,盐水和水银液面升高
C.酒精和水面都升高,盐水和水银液面降低
D.水面升高,酒精液面高度不变,盐水和水银液面升高

答案

参考答案:B

解析: 按照密度高低.液体可排列如下:水银>盐水>酒精。根据物理学中浮力的定律,可以推出选项B正确。故选B。

阅读理解

The World Cup has been on for some days in South Africa.It’s said that more than 2.2 billion peoplep are watching the World Cup.People fly their national flags, wear football shirts and talk about the exerciting games. Also different people have their own ways to enjoy games.

Adam, a football fan, likes going to the bar to watch the games with his friends. They can chat and drink during some of the less important games. Sometimes he meets many foreigners in the bar.They like to sing songs happily, or even dance when a player scores a goal.

Ivan a university student, enjoys watching online. He says it’s hard to get together with friends on weekdays, so watching online is a really a good way to enjoy the World Cup.

A girl called janet often watches the games at home with her family. She said,“In the bar, you always meet people who support different     teams, so it can  be embarrasing.” She thinks the most important thing is that she feels comfortable while watching at home. She can      sit any way she likes.

The World Cup makkes people excited and relaxed. No matter in what way you watch it, just enjoy soccer,just enjoy yourself.

Judge the following sentences true(T) or false(F)

小题1:It’s said that over 2.2 billion people are watching the World Cup.

小题2:Adam likes watching the games with his friends in the bar.

小题3:It’s a good way for Ivan to watch the World Cup online.

小题4:Janet often watches the games at home alone.

小题5:All the people enjoy the World Cup in the same way.

单项选择题