问题 填空题

化学与生产、生活息息相关,请回答有关问题.

(1)下列服装所使用的材料中,属于有机合成材料的是______(填标号).

A.纯棉帽子;B.羊毛杉;C.涤纶运动裤

(2)鉴别羊毛纤维与棉纤维的方法是______,有烧焦羽毛气味的是羊毛纤维,另一种是棉纤维

(3)“垃圾是放错位置的资源”.下列家庭生活中常见的垃圾:①塑料瓶②烂菜叶③废电池④废报纸,能引起白色污染的是______(填序号);

(4)写出一条防止自行车链条生锈的措施______.

答案

(1)纯棉和羊毛属于天然纤维,涤纶属于合成纤维,属于合成材料;故填:C;

(2)羊毛纤维的主要成分是蛋白质,燃烧后有烧焦羽毛的味道,所以鉴别羊毛纤维与棉纤维的方法是取样点燃,有烧焦羽毛气味的是羊毛纤维,另一种是棉纤维;故填:取样点燃;

(3)塑料制品难以降解,随意丢弃会造成白色污染,所以能引起白色污染的是塑料瓶;故填:①;

(4)铁生锈的条件是与氧气和水同时接触,所以条防止自行车链条生锈的措施在链条表面涂一层润滑油.故填:在链条表面涂一层润滑油.

单项选择题 A1/A2型题
阅读理解

第二部分:阅读理解(共20小题; 每小题2分,满分40分)

Around six weeks ago, Kaileen came running into the house, just getting off the bus from school. She was all excited about a story about homeless pets because of Hurricane (飓风) Katrina and all that was going on to help them. She said that this information came from her animal newspaper (your KIND News). Kaileen has a great love and compassion (同情心) for animals, so her excitement did not surprise me. Her next ideas, however, did. She said that we should go around right then to our neighbors and collect all their change to send to the animal shelters (保护所).

I thought this was a school project, but in fact, it was not. This was what Kaileen wanted to do on her own! Well, it warmed me all over. To see your child so willing to help others just lets you feel that maybe you had done something right in raising (养育) her.

Anyway, I told her to make a card and send it out to our neighbors first. With the help of her older brother, Kaileen soon made a lovely card that asked our neighbors to help these pets by giving their spare change. She gave them a few days and a date she would come by to pick up any donations (捐赠). 

Well, I had to go out and buy a donation box. Kaileen collected $279.50!!! I just thought you would like to know how KIND News had touched a little one’s heart and given her the idea to show her compassion for animals. Thank you — we really enjoy your paper.

36. The passage is probably taken from ______. 

A. a report about a warm-hearted girl

B. an advertisement for an animal shelter 

C. a thank-you letter to a newspaper

D. a donation program for homeless pets 

37. What was the author’s feeling about Kaileen’s idea? 

A. Pleased and excited. 

B. Surprised and moved.

C. Tired and sad.                         

D. Worried and angry.

38. From the passage we learn that KIND News ______.

A. collects donations for homeless people 

B. sets up many shelters for homeless animals 

C. tells children how to keep pets healthy 

D. encourages children to help homeless pets 

39. We can infer that the passage is written by Kaileen’s ______.

A. parent          B. teacher         C. brother      D. neighbor