题目内容
阅读理解。
Antifreeze is a liquid (液体) that is added to water to keep it from freezing. When water freezes and turns
to ice, it expands (膨胀). The force of water expanding is so great that it will break the hardest metal. Water
is used in car engines (发动机) to keep them cool while they run,and if this water is allowed to freeze in
winter it can break the iron block of the engine. That is why antifreeze is necessary.
Water freezes at 0℃;the usual kind of antifreeze will not freeze until the temperature is -40℃. A
mixture (混合物) of five parts of water and four parts of antifreeze will prevent freezing at -18℃;four
parts of water and five parts of antifreeze reduce this to -22℃.
Alcohol is a kind of good antifreeze, but when the air is running it becomes hot and the alcohol boils away,
so it must be changed very often. Most people use antifreeze that does not boil away when the engine is
running. There are several chemicals that do this. One of the most popular is called ethylene glycol.
to ice, it expands (膨胀). The force of water expanding is so great that it will break the hardest metal. Water
is used in car engines (发动机) to keep them cool while they run,and if this water is allowed to freeze in
winter it can break the iron block of the engine. That is why antifreeze is necessary.
Water freezes at 0℃;the usual kind of antifreeze will not freeze until the temperature is -40℃. A
mixture (混合物) of five parts of water and four parts of antifreeze will prevent freezing at -18℃;four
parts of water and five parts of antifreeze reduce this to -22℃.
Alcohol is a kind of good antifreeze, but when the air is running it becomes hot and the alcohol boils away,
so it must be changed very often. Most people use antifreeze that does not boil away when the engine is
running. There are several chemicals that do this. One of the most popular is called ethylene glycol.
1. People use ________ to keep car engines cool.
A. antifreeze
B. water
C. alcohol
D. ethylene glycol
B. water
C. alcohol
D. ethylene glycol
2. The usual kind of antifreeze freezes at ________.
A. 0℃
B. -18℃
C. -22℃
D. -40℃
B. -18℃
C. -22℃
D. -40℃
3. We use antifreeze in order to ________.
A. keep alcohol in water
B. stop ice from becoming water
C. make the freezing point of water lower
D. raise the freezing point of water
B. stop ice from becoming water
C. make the freezing point of water lower
D. raise the freezing point of water
4. Besides alcohol, ________ is another kind of popular antifreeze.
A. water
B. ethylene glycol
C. any chemical
D. any mixture
B. ethylene glycol
C. any chemical
D. any mixture
5. The text is written to ________.
A. tell us what antifreeze is
B. make people buy antifreeze
C. tell us that cars need antifreeze
D. show us how to protect car engines
B. make people buy antifreeze
C. tell us that cars need antifreeze
D. show us how to protect car engines
1-5 BDCBA
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An old farmer lived with his grandson. Each morning, the 1 got up early and read his Bhagavad Gita (薄迦梵歌). One day the grandson asked, "Grandpa! I try to read the book like you 2 I can't understand it, and I forget it easily. What's the 3 of reading it?" The grandfather said, "Take this coal (煤炭) basket down to the 4 and bring me back a basket of water." The boy did as his grandfather 5 , but all the water ran 6 he got home. The grandfather laughed, "You'll have to move faster next time." This time the boy 7 faster, but again the basket was empty. He told his grandfather that is was 8 to carry water in a basket. He wanted to use a bottle instead, but the old man said, "I just want a basket of water. You're not 9 hard enough." The boy wanted to show his grandfather that the water would surely run. He again put the 10 into the river and ran hard. But there wasn't anything in it again. He said 11 ,"Look, grandpa, it's useless!" "Watch the basket." said the grandfather. For the first time the boy 12 the basket was different. It had changed from a dirty old coal basket into a 13 one, inside and out. "Boy, you might not understand or remember 14 when you read the book, but when you read it, you will be 15 , inside and out. That's what you got from it." | ||||
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