问题 问答题 简答题

颜料与染料有什么区别?

答案

参考答案:颜料与染料不同。染料是有色有机化合物,一般是可溶性(溶于水或有机溶剂),或转变为可溶性溶液,或有些不溶性染料(如分散染料等)可通过改变染色工艺或经过处理成为分散状态而使纤维物质染料。颜料是不溶性的有色物质,以高度分散微粒状态使被被着色物着色,对所有的着色对象均无亲和力,常和具有粘合性能的高分子材料合用,靠黏合剂,树脂等其它成膜物质与着色对象结合在一起。

阅读理解

阅读理解。

     On June 30, 2009, a Yemenia airplane from Paris to Comoros, Africa, crashed into the Indian Ocean.

There were 153 people on the plane, including some French officials. Though people have been searching

since the plane went down, the result looked unpleasant, for most of the passengers might be in bad luck.

     But a 13-year-old girl called Bahia Bakari was discovered in the water, where she had been staying afloat

(漂浮的) by holding a piece of wreckage (残骸) from the plane tightly fo over 13 hours. When they found

her, the girl was too weak to catch he lifebuoy (救生圈) thrown to her, instead, a Comoran police officer,

said Abdilai, jumped into the water to pull the child onto the boat.

     Bahia Bakari was injured, especially her collarbone (锁骨) her father was pleased to see his daughter

although his wife had gone away in this tragedy. He said that his daughter could hardly swim. It was really

a miracle for her to escape in this way. In her daddy's warm arms, the girl could soon remember what she

had experienced."I was thrown out of the plane and then I saw the plane fall into the water. Next I found

myself in the water. I couldn't swim very well and I caught something but I didn't know what is was," said

the girl.

     "She is really a lucky young girl," said Alain Joyandet, France's minister for International Cooperation.

1. The Yemenia airplane took off in _________.

A. Africa

B. Paris

C. Comoros

D. the Indian Ocean

2. What does the underlined word "tragedy" mean in the passage?

A. 救援

B. 车祸

C. 闹剧

D. 灾难

3. Bahia Bakari had been staying in the water for more than _________.

A. a day

B. half a day

C. a week

D. half a week

4. Which of the following is TRUE according to the passage?

A. Bahia Bakari was saved by the lifebuoy

B. Bahia Bakari's father saved his daughter

C. Bahia Bakari's mother died in the accident

D. Bahia Bakari could swim well, so se escaped

5. What's the best title for the passage?

A. A lucky girl

B. A sad family

C. A broken plane

D. A brave police officer

单项选择题