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阅读理解。 Reading newspapers has become an important part of our life.  Many people begin their day by reading the papers.  In this way they learn what is going on in the world.  Sometimes, however, they do not have time to read the news carefully, so they just take a quick look at the front page; at other times they may be in such a hurry that they have time only to look at the headlines(标题). There are newspapers to meet the needs of every reader.  In big cities there are many kinds of papers. In small towns there are fewer newspapers. In some places the paper is published(出版) once a week. Today, as a group, English language newspapers enjoy the largest number of readers.  With the development(发展) of the world,  some new newspapers will be published in the years to come. 1. Many people______as the first thing every morning. A. read newspapers B. watch the TV news C.listen to the radio 2.When people are busy, they______. A. still read newspapers carefully B. only look at the front page of the paper carefully C. either take a quick look at the front page of the paper or only look at the headlines 3. Which of the following is right? A. There are different kinds of newspapers to meet people's needs. B. There are more papers in small towns than in big cities. C. The most important news is not on the front page. 4.______enjoy the largest number of readers. A. Newspapers in Chinese B. Newspapers in English C. Newspapers in German 5. 'Some new newspapers will be published in the years to come. ' means______. A. more newspapers will be published next year B. more new kinds of papers will be read in the coming year C. a great number of new newspapers will be seen in the future
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A.
250nm
B.
181.2nm
C.
125nm
D.
90.6nm
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正确
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错误
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A.
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B.
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【单选题】在折射率n 3 =1.60的玻璃片表面镀一层折射率n 2 =1.38的MgF 2 薄膜作为增透膜。为了使波长为 的光,从折射率 =1.00的空气垂直入射到玻璃片上的反射尽可能地减少,薄膜的最小厚度 应是()。
A.
250nm
B.
181.2nm
C.
125nm
D.
90.6nm
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A.
指纹区
B.
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C.
特征区
D.
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A.
正确
B.
错误
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