The phrase “from can to can’t” in paragraph 1 means ______.
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1 .Paragraph 4 _________.
A The Definition and the Description of the Ions B The Definition and the Description of the Stratosphere C The Sun’s Rays D Recent Studies of the Upper Atmosphere VS Past Studies E The Definition and the Description of the Troposphere F The Composition of the Atmosphere
2 .At the top of Jungfrau, which towers 12000 feet above the town of Interlaken in Switzerland, the temperature is usually _________.
A contains a layer of ozone gases B about 42 degrees colder than on the ground C 21% oxygen by weight D less than 1% of xenon by volume E about 75 degrees colder than in Interlaken F is warmed by the earth’s heat.
3 .Life as we know exists on the earth because the atmosphere ___________.
A contains a layer of ozone gases B about 42 degrees colder than on the ground C 21% oxygen by weight D less than 1% of xenon by volume E about 75 degrees colder than in Interlaken F is warmed by the earth’s heat.
4 .The atmosphere consists of ___________.
A contains a layer of ozone gases B about 42 degrees colder than on the ground C 21% oxygen by weight D less than 1% of xenon by volume E about 75 degrees colder than in Interlaken F is warmed by the earth’s heat.
5 .The troposphere is the warmest part of the atmosphere because it __________.
A contains a layer of ozone gases B about 42 degrees colder than on the ground C 21% oxygen by weight D less than 1% of xenon by volume E about 75 degrees colder than in Interlaken F is warmed by the earth’s heat.
7 .How to spend leisure time wisely is not a particularly difficult problem for people ______.
A who are very busy everyday B who are sick in bed C who are aged and in good health D who have retired from work
8 .How does the author look at work and leisure？
A We work hard so that we can enjoy more leisure. B We enjoy leisure so that we can come back to work with fresh energy. C Leisure can bring us a lot of pleasures that work cannot. D The success of work has little to do with how we spend our leisure time.
9 .What is the relationship between leisure and recreation, according to the author？
A Leisure and recreation are closely related. B Leisure and recreation are identical. C Recreation covers all kinds of leisure activities. D Recreation does not belong to any leisure activity.
10 .From the passage we know that ______.
A leisure has been an old problem since ancient times B leisure cannot be replaced as the most important part of life C our success in work is mostly determined by whether we use leisure wisely D good recreational activities contribute greatly to health，growth and spirit
