[originaltext] Can you imagine ice that does not melt and is not wet? Have y

游客2023-06-26  34

问题  
Can you imagine ice that does not melt and is not wet? Have you ever heard of dry ice?[22]Dry ice is made by freezing a gas. It is quite different from ordinary ice which is simply frozen water.[25]Dry ice was first manufactured in 1925. It has since fulfilled the hope of its inventor.[23]It can be used for making artificial fog in the movies. When steam is passed over dry ice, a very dense vapour rises. It can also be used for destroying insects in grain supplies.[24]It is more practical than ordinary ice because it takes up less space and it is 142 degrees colder. Since it turns into steam, instead of melting into water, it is cleaner to use. For these reasons, it is extremely popular and many people prefer it to ordinary ice. Dry ice is so cold that if you touch it with your bare fingers, it will burn you.
22. What is dry ice made of?
23. How is an artificial fog made in the movies?
24. What is the advantage of dry ice over ordinary ice?
25. When was dry ice first made?

选项 A、It takes a longer time to melt.
B、It is lighter to carry.
C、It is cleaner to use than ordinary ice.
D、It is not so cold as ordinary ice.

答案 C

解析 细节题。短文中提到,干冰比普通的冰更实用(practical),因为干冰省空间且温度更低;干冰直接化为蒸汽,因此使用起来更干净(cleaner touse),C)符合原文,故为答案。
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