设|z|=3，则|z-3+4i|的最小值为 A.3 B.2 C.5 D.8 E. - 查题网

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河南成教 / 高等数学（上）

正确率：100%

设|z|=3，则|z-3+4i|的最小值为

A.3

B.2

C.5

D.8

E.

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高等数学（上）

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题型描述: 阅读理解With the steady increase in the amount of leisure time that people enjoy today, the importance of businesses that deal with leisure products and services is also steadily increasing. Among them, tourist industry is one of the biggest industries of this kind. Providing transportation and accommodations for tourists — and guides, brochures, souvenirs — is one of the major industries in many countries. Since people are now having longer vacations and are more and more interested in seeing other parts of the world, this business will no doubt continue to grow. Another industry obviously devoted to leisure is entertainment. Movies, TV shows, concerts and plays are usually intended for our leisure. The same can be said of most books, except textbooks. Professional sports make money because people pay to watch them in their free time. This list could be greatly extended. But even among these industries, we have mentioned only part of the picture. The people who make the TV sets and build the theatres and tourist hotels are as much a part of the leisure industry as the singers or the hotel clerks.1、 What makes leisure business important according to the passage? A. Longer vacations are offered than before. B. More people are interested in seeing other parts of the world. C. Improved transportation and accommodation conditions. D. People’s leisure time is increasing. 2、 According to the passage, the reason that tourist industry will continue to develop is _ _ _ _ _ . A. guides are offering better services B. transportation is more convenient C. people are more willing to travel D. accommodation is more comfortable 3、 What do we know about entertainment from the passage? A. Making TV sets and building theatres are also part of entertainment industry. B. Movies, TV shows, concerts and books are usually intended for our leisure. C. People are usually reluctant to pay to watch professional sports. D. Entertainment is the largest leisure industry. 4、 The list of entertainment industries in paragraph 2 _ _ _ _ _ _ _ _ _ _ . A. is not a complete picture of leisure industry B. covers all the aspects of these industries C. excludes those who work behind the scene of leisure industry D. includes textbooks into entertainment 5、 What’s the main idea of this passage? A. Now that people have more leisure time, entertainment industry has become one of the major industries in many countries. B. Now that people have more leisure time, leisure business is becoming more important in economic life. C. Now that people have more leisure time, tourist industry has become the largest industry in many countries. D. Now that people have more leisure time, leisure business list is being extended.统考英语A