完形填空Thewaterandthelandarethoughtpartoftheearthsurface(表...
问题详情:
完形填空
The water and the land are thought part of the earth surface (表面). The air is 1 thought a kind of blanket 2 the earth. But it is 3 than that. Maybe you have been in a cave (洞穴) 4 in the earth. Did you think about the air that was in the cave? The land has some air mixed in it. Air is even mixed 5 the water in the sea. These examples show that some air is 6 the earth’s surface as well as above it.
Men once 7 that there were four basic things from which everything else was made. They 8 these things—earth, fire, air, and water the four elements(元素). 9 man made more observations, they 10 that fire was not an element. 11 they concluded (得出结论) that land, air and water were not elements, 12 .
13 , there are more than 100 elements from which scientists believe all things are made. 14 land, air and water are not elements, they are three main parts of man’s environment. You will 15 more about them as you study the Earth.
【回答】
1A2B3B4D5C6A7B8A9C10C11B12D13C14D15D
知识点:日常生活类
题型:完型填空
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________manyAmericansbelievethere'sstillalottobedone,th...
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下列化学用语表达正确的是( )A.羟基的电子式 B.乙烯的结构简式是CH2CH2C.醛基的结...
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