男性68岁，2型糖尿病患者，由于病情轻，平时仅饮食管理即能控制，本次因高热入院，胸透

E-book is short for electronic( 电子的) book. It is usually read on personal computers. Some

mobile phones can also be used to read e-books.

Earlier e-books were written for a specific group of readers and were about only a few subjects. With the development of the internet, knowledge and answers to a lot of questions mainly come from e-books. This is why the e-book business is increasing quickly

E-books have many advantages. First, they save time. We don’t need to go to a bookstore to buy books, besides, we can find the topic we want to know about on the Internet, and then we can quickly get many e-books on similar topics. Second, e-books save money. Some e-books cost a little money, and there are millions of e-books on the Internet that we can get for free. Third, more trees are saved because e-books don’t need to be printed(印刷) on paper. Fourth, e-books make reading more convenient. You can carry a whole library of hundreds of books with you in a small computer or any e-book reader (电子阅读器) without worrying about their weight.

But e-books have certain disadvantages. They need a personal computer or an e-book reader and the information can be lost if its file format (文件格式) is not supported or changed in the reader’s computer.

However, e-books provide us with a new way of reading. That is good.

根据短文内容，选择最佳答案。

小题1:Why is the e-book business increasing quickly? Because _________.

A．earlier e-books are about only a few subjects.

B．people don’t like to read any paper books any more.

C．most e-books have been written for a specific group of readers.

D．the development of the Internet makes e-books more useful.小题2:How many advantages do e-books have according to this article?

A．Three

B．Four

C．Five

D．Six小题3:Which of the following is true according to this article？

A．E-books can’t be red on mobile phones.

B．All the e-books on the Internet cost lots of money.

C．E-books can make reading more convenient.

D．You can’t read e-books without a personal computer.小题4:What is the disadvantage of the e-books?

A．You’ll lose the information if its file format is not supported.

B．You can carry hundreds of books in an e-book reader.

C．You can buy cheap e-books anywhere.

D．You can read e-books at any time.小题5: The author mainly tells us __________.

A. you don’t need to buy paper books in a bookstore if you read e-books.

B. the information can be lost if its file format is changed.

C. the development of e-books can help save the environment.

下列溶液中Cl^-浓度最小的是[ ]

A．200mL 2mol/L MgCl₂溶液

B．1000mL 2.5mol/L NaCl溶液

C．300mL 5mol/L KCl溶液

D．250mL 1mol/L AlCl₃溶液

汽车排放尾气后，造成温室效应的主要物质是（）。

A.二氧化碳

B.一氧化碳

C.二氧化氮

D.二氧化硫

Silicon Valley is a magnet to which numerous talented engineers, scientists and entrepreneurs from overseas flock in search of fame, fast money and to participate in a technological revolution whose impact on mankind will surely surpass the epoch-making European Renaissance and Industrial Revolution of the bygone age.
(46) With the rapid spread of the Internet since the early 1990s, and the relentless technological innovations generated through it, the information era is truly upon us, profoundly influencing and changing not only our lifestyle, but also the way we work, do business, think and communicate with others.
(47) The unprecedented success of the Valley is a testimony to the concerted international endeavors and contributions by people from diverse cultural and racial backgrounds, made possible by the favorable political, economic and intellectual climate prevailing, as well as the farsighted policies of the US government.
Many countries have, or are in the process of creating, their own "Silicon Valley". So far, none has as yet threatened the preeminence of the US prototype. What makes Silicon Valley such a Unique entity There are several crucial factors.
(48) First and foremost, it has the largest concentration of brilliant computer professionals and the best supporting services in the world, and easy access to world-class research institutions, like Stanford University, which continually nurtures would-be that the industry needs in order to move forward. Without these advantages, the Valley would be a different place.
Secondly, it actively encourages, or even exalts, risk taking. Hence, failure holds no terror and there is no shame attached to a failed effort. On the contrary, they will try even harder next time round. Such never-say-die approach is the sine qua non for the ultimate triumph in entrepreneurship and technological breakthrough.
(49) A third decisive factor is the vital role of venture capitalists who willingly support promising start-ups with urgently needed initial capital to get them started. Some would even give failed entrepreneurs a second chance if convinced that a fresh concept might lead to ultimate success.
(50) Of equal importance, bright young people and middle level professionals are keen to work for a new venture at substantially reduced remuneration, as it offers more scope for entrepreneurship and job satisfaction than the established companies. There is also a pride of achievement if their efforts contribute to its fruition.
Intellectual challenges aside, it is a common practice for start-ups to offer generous share options to employees in order to attract the right talent into their folds. This is a powerful incentive to motivate the staff to do their utmost and to share in the company’s prosperity if it reaches its goal Many regard this as the foundation of a successful enterprise.

硫化氢是一种无色无味的有毒气体。