粘土岩类生油层主要包括()。A、泥岩、页岩、粘土岩 B、细砂岩、中砂岩 C、砂质泥岩

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问题:

粘土岩类生油层主要包括()。

A、泥岩、页岩、粘土岩

B、细砂岩、中砂岩

C、砂质泥岩、泥质粉砂岩

D、生物灰岩、泥灰岩

考点:井下作业工初级井下作业工初级井下作业工题库
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保险公司应当于每月月底前将本月的营业统计报表报送保险监督管理机构。

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医学实验包括_________基本组成部分

A.2个

B.3个

C.4个

D.5个

E.6个

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关于吞咽障碍的摄食训练,下列说法不正确的是()。

A.严禁在水平仰卧及侧卧位下进食

B.进食体位,一般选择半卧位及坐位下配合头颈部运动

C.食物症状选择以先易后难为原则

D.进食最好定时定量,按一定比例进行

E.容易吞咽食物的特征为密度均一、流质

题型:单项选择题

People don’t want to buy information online. Why Because they don’t have to. No more than that because they’re used to not paying for it. That’s the conventional wisdom. Slate, Microsoft’s online politics-and-culture magazine, is an oft-cited example of the failed attempts to charge a fee for access to content. So far, for most publishers, it hasn’t worked.

But nothing on the Web is a done deal. In September graphics-soft-ware powerhouse Adobe announced new applications that integrate commerce into downloading books and articles online, with Simon & Schuster, Barnes and Noble, and Salon. corn among its high-profile partners. Some analysts put the market for digitized publishing at more than $100 billion. Of course, if the Internet can generate that kind of money—some might say almost any kind of money—people want in. And this couldn’t come at a better time. Newspaper and magazine writers in particular are increasingly frustrated by their publishers, which post their writings online but frequently don’t pay them extra.

So here’s the good news: Fathrain. com, the third biggest book-seller on the Net—after Amazon. com and Barnesandnoble. corn—is now doing just what the publishing industry that made it a success fears., it’s offering a secure way to pay for downloadable manuscripts online. Fatbrain calls it offshoot eMatter. With it, the company’s executives have the radical notion of ousting publishers from the book-selling business altogether by giving writers 50% of each and every sale (To reel in authors, eMatter is running a 100% royalty promotion until the end of the year. ) Suggested prices to consumers range from a minimum $ 2 to $ 20, depending on the size of the book to download.

"This will change publishing forever!" Chris MaeAskill, co-founder and chief executive of Fatbrain, declares with the bravado of an interior decorator. "With eBay, anybody could sell antiques. Now anybody can be published. "

There’s been no shortage of authors wanting in. Within a few weeks, according to the company, some 2,000 writers signed on to publish their works. Some of this is technical stuff—Fatbrain got where it is by specializing in technical books—but there are some well-known writers like Catherine Lanigan, author of Romancing the Stone, who has put her out-of-print books and a new novella on the site. Another popular draw is Richard Bach, who agreed to post a 23-page short story to the site.

Not everyone thinks downloadable documents are the biggest thing in publishing since Oprah’s Book Club. "I think it will appeal to sellers more than buyers," says Michael May, a digitalcommerce analyst at Jupiter Communications, which released a report that cast doubt on the market’s potential. "A lot of people are going to publish gibberish. The challenge is to ensure the quality of the work. "

Blaine Mathieu, an analyst at Gartner Group’s Dataquest, says, "Most people who want digital content want it immediately, I don’t know if this model would satisfy their immediate need. Even authors may not find that Web distribution of their works is going to bring them a pot of gold. For one thing, it could undermine sales rather than enhance them. For another, anybody could e-mail downloaded copies of manuscripts around town or around the world over the Net without the writer’s ever seeing a proverbial dime. " Softlock. com, Authentica and Fatbrain are trying to head this problem off by developing encryption padlocks that would allow only one hard drive to receive and print the manuscripts. For now, the problem persists.

Which of the following is NOT a reason for some people’s belief that e-publishers will not succeed()

A. Readers often want immediate digital content

B. Authors usually do not believe they’ll earn money on Net

C. The quality of the books on Net is hard to manage

D. Books that sell well usually do not turn to Net

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为防止空气预热器金属温度太低,而引起腐蚀和积灰,在点火初期应将送风机入口暧风器解列,热风再循环挡板关闭,以降低空气预热器入口风温。

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