问题 问答题

现有八种物质,选择相应物质的字母填空:

A.氢气  B.硬铝  C.甲烷  D.石油  E.生石灰  F.食盐  G.干冰  H.氮气

(1)______可用作厨房调味品      

(2)______可用作制造飞机

(3)______可用于人工降雨        

(4)______是最理想、清洁的燃料

(5)______被誉为“工业的血液”

(6)______是空气中含量最多的气体

(7)______是天然气的主要成分    

(8)______可用作食品干燥剂.

答案

(1)食盐有咸味,可作厨房调味品;      

(2)硬铝硬度大,质轻,可用作制造飞机;

(3)干冰易升华吸热,能使空气中的水蒸气冷凝成小水珠,可用于人工降雨;        

(4)氢气燃烧的产物是水,无污染,是最理想、清洁的燃料;

(5)石油在工业上有着重要的应用,被誉为“工业的血液”;

(6)氮气是空气中含量最多的气体;

(7)甲烷是天然气的主要成分;    

(8)生石灰能与水反应,常用作干燥剂;常用作食品干燥剂.

故答为:(1)F;(2)B;(3)G;(4)A;(5)D;(6)H;(7)C;(8)E.

阅读理解
Are the lives of city kids the same as those in villages? In lots of ways, they are very different.  But what are the differences?
Hu Peng and his four friends decided to find them out.  Earlier this month, they went to live for a week at Huagui Village near Xishui.  They went door to door there and asked kids there lots of questions.  They wanted to learn more about village kids’ everyday lives, so they asked questions like these: Do your parents teach you how to do housework? How much money do you usually spend on dinner? What would you do if a thief comes into your houses? They also asked 150 city kids the same question.
On April 12, the team gave a report to their class.  They told about lots of differences between children’s lives in cities and those in villages.  The biggest difference is independence.  Hu’s team say that more than 60 percent of city kids can’t do much housework, but more than 80 percent of village kids can care for themselves.
City kids told Hu they cared about school a lot, and they had no time to wash clothes or make their beds.  Village kids said they helped their parents with a lot: they cook, clean houses and feed farm animals, Hu’s team also saw that village kids had less pocket money.  Many never use computers.  They play in rivers or on mountains.  Some don’t really like to make new friends.
Hu’s team said their trip gave them more self-confidence(自信心) because they were doing something by them-selves.  But it also worried them a bit because they saw they still had a lot to learn.  “When we grow up, our parents can’t take care of us,” Hu said.  “We have to learn to take care of ourselves. ”
请根据短文内容完成下表信息:
Kids in the city
Kids in the country
Can’t do much housework
小题1:____________________
No time to wash clothes or make bed
小题2:____________________
Have pocket money
Have less pocket money
Use computers
小题3:____________________
小题4:____________________
Don’t like to make new friends
名词解释