题目内容

【题目】以下说法正确的是（ ）

A．溶液一定是均一、无色、稳定的

B．均一、稳定的液体一定是溶液

C．溶液的溶质一定是固体

D．溶液一定是混合物

【答案】D

【解析】溶液一定是均一、稳定的，但不一定是无色的，如硫酸铜溶液是蓝色的，A错；蒸馏水是均一、稳定的液体，但不是溶液，B错；固体、液体、气体都可以作溶质，C错；溶液是由溶质和溶剂组成的，故属于混合物，D正确．

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【题目】C

People eat different things in different parts of the world.

In some countries, people eat rice every day. Sometimes they eat it two or three times a day for breakfast, lunch and supper. They eat rice with meat, fish and vegetables. Some people do not eat some kinds of meat. Muslims(穆斯林), for example, do not eat pork. Japanese eat lots of fish. They are near the sea. So it is easy for them to get fish.

In Western countries such as Britain, Australia and the USA, the most important food is bread and potatoes. People there can cook potatoes in many different ways.

Some people eat only fruit and vegetables. They do not eat meat or fish or anything from animals. They eat only food from plants(植物). Some people say that food from plants is better than meat. These people are called vegetarians.

【1】 What does the underlined word ＂vegetarians＂ mean in Chinese?

A. 肉食主义者 B. 生食主义者

C. 果食主义者 D. 素食主义者

【2】__________ do not eat pork.

A. Chinese B. Japanese

C. Muslims D. Americans

【3】 Why do Japanese eat lots of fish?

A. Because they like fish better than the other food.

B. Because it is easy for them to get fish.

C. Because fish can give them lots of calories.

D. Because they think eating fish can make them clever.

【4】 What is the most important food in Australia?

A. Fish. B. Bread. C. Vegetables. D. Fruit.

【5】Which one of the following sentences is true?

A. People in different countries eat different food.

B. If you only eat food from animals, you are a vegetarian.

C. Food from animals is better than food from plants.

D. People in some Western countries can only cook potatoes in one way.

【题目】相信你会辨别：

写出下列溶液中的溶质、溶剂：

溶液

氯化钠溶液

高锰酸钾溶液

过氧化氢溶液

碘酒

澄清石灰水

盐酸

溶质

溶剂

由上（并结合书本）可知：

（1）________是最常见的溶剂．

（2）溶质状态可以是________________________．

（3）固体、气体与液体混合，________是溶剂．

液体与液体混合，有水的，水是________；无水的，量多的是________．

小窍门：可以根据________________辨别出溶质、溶剂．

【题目】A man once bought a parrot. The man let him fly freely all over the house instead of putting him in the cage. The parrot was pleased with that and flew from room to room，screaming with happiness.

"Who on earth are you?" said a voice from below. "Don't make that terrible noise any more."

The parrot saw a cat staring(盯着)up at him from the floor.

"I'm a parrot. 1've just arrived and I'm to make as much noise as I can，”he said.

"Well，I've lived here all my life, " answered the cat. "I was born in this house and I learnt from my mother that it is the best to keep quiet here."

"Keep quiet then，" said the parrot happily. "I don't know what you do around here, but I know my job. My master bought me for my voice and I'm going to make sure he hears it."

【1】The underlined word "master" means " " in Chinese.

A. 爸爸 B. 主人 C. 哥哥 D. 亲戚

【2】There are kinds of animals in the passage.

A. four B. three C. two D. one

【3】The cat asked the parrot to

A. listen carefully B. keep noisy

C. keep quiet D. do his job

【4】From the passage we know .

A. everyone should do his job

B. the cat sleeps every day

C. the parrot is not free

D. the cat has just arrived at the house

【题目】人们日常生活中，各种洗涤剂被广泛应用，下列洗涤剂中所用洗涤剂不具有乳化

功能的是（ ）

A.用汽油除去衣服上的油污

B.用餐具洗洁精清洗餐具上的油污

C.用肥皂液洗衣

D.用沐浴露洗澡

【题目】Ⅲ. 根据要求完成下列句子。

【1】They played volleyball yesterday afternoon. (改为一般疑问句)

________they ________ volleyball yesterday afternoon?

【2】I went to Central Park with my sister on Sunday. (改为否定句)

I ________ ________ to Central Park with my sister on Sunday.

【3】Lucy bought a watchphone ten minutes ago. (对画线部分提问)

________ ________ Lucy ________ ten minutes ago?

【4】Jack is watching a football game on TV now.

(用last night替换now)

Jack ________ a football game on TV last night.

【5】My father went to Beijing yesterday. (对画线部分提问)

________ ________ your father ________ yesterday?

【题目】t℃时，有一杯接近饱和的硝酸钾溶液，下列做法一定不能使其变为饱和溶液的是（ ）

A．恒温蒸发溶剂

B．降低溶液的温度

C．向溶液中加入硝酸钾

D．向溶液中加入t℃时硝酸钾的饱和溶液

【题目】The price of the trousers ______29 dollars.

A. are B. is C. be

【题目】小明先是在地面上走动，后又静止在地面上，则他对地面的压力和压强（ ）

A.压强减小，压力不变 B.压力、压强都增大

C.压力、压强都不变 D.压力不变，压强增大

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