化学兴趣小组的同学做了以下测试：点燃酒精灯，用一张滤纸平放在火焰上，约2S后取出

欲观察寄生在人体血细胞内的微丝蚴，可把红细胞置于（　　）

A．蒸馏水中

B．5%蔗糖溶液中

C．瑞氏溶液中

D．生理盐水中

2008年5月12日，我国四川等地出现百年一遇的特大地震自然灾害，给百姓的生产生活带来了严重影响。党中央、国务院要求各地区、各部门紧急行动起来，坚决打好抗灾减灾的硬仗，确保人民生命财产安全，这一要求的哲学依据是

①人民群众是实践的主体  ②人民群众是历史的创造者 ③必须树立群众观点、坚持群众路线 ④国家机构必须遵循对人民负责的原则

A．①②③

B．①②④

C．①③④

D．②③④

For many of us, printed books are satisfying in ways beyond the words they contain. Billions of printed books have been published, read and saved in the 600 years since movable type was invented, so why mess with a good things?

Sony Electronics is doing just that, betting that readers will be won over by the convenience of readability of its new electronic book devices. Sony's reader, the PRS-505, can hold 160 books in its fixed memory, enough to line the shelves on a good-sized wall in the average American home. The $299 device is about the size of a paperback book, but a half-inch thick and weighs less than a pound.

The Sony book reader is revolutionary not only in its storage capacity. The font（字体） is highly readable and adjustable by size. Unlike laptop computers, you can put the Sony in your purse, read it in direct sunlight and even bookmark the pages. And you can connect it to your PC to download books.

Surprisingly, though the reader has liberated the book from paper, electronic books aren't always a bargain. For example, David Baldacci's "Stone Cold" download retails（零售） for $15.19 at the Sony site, while Amazon（卓越网） will deliver a hard copy to your mailbox for $16.19.

The Sony reader also lets you store and play or display music. So what's not to like about the Sony? Well, for many bibliophiles, a lot. Book lovers like to have, hold and keep their volumes, which don't need charging. You can write notes in the margins, and enjoy the ambience they provide on your book shelves.

The need for electronic reading devices is likely to grow as more people worried about the billions of tons of paper used for printed material. Many believe the time will come when devices like the Sony reader are as common as printed newspapers and magazines today.

1．What would be the best title for the passage?

A. The age of the electronic book reader is coming

B. Printed books are out of date

C. The Sony reader meets many readers’ needs

D. The revolution in book readers

2．According to the passage, the Sony book reader _________.

A. is as light as a laptop computer               B. can hold more than 200 books

C. is convenient to carry around                  D. cannot be connected to a PC

3．What is the author’s point when he mentions “Stone Cold”?

A. Amazon’s printed books are very cheap

B. “Stone Cold” can be got from the Sony site and Amazon

C. The Sony book reader is not very cheap to use

D. The Sony book reader can benefit its buyers a lot

4．The underlined word “bibliophiles” in Paragraph 5 refers to “__________”.

A. music lovers                                            B. book lovers

C. electronic reading devices                      D. Sony readers

5．According to the author, what’s the future for the electronic reading devices?

A. They’ll replace printed newspapers and magazines

B. They’ll still be more expensive than printed newspapers

C. They’ll become a must in people’s daily life

D. They’ll become more popular as time goes on

获得神经传导阻滞的条件是（）

A.局麻药必须达到足够的浓度

B.必须有充分的时间，使局麻药分子到达神经膜上的受体部位

C.应有一定的局麻药量

D.有足够的神经长轴与局麻药直接接触

E.注射局麻药的部位

下列选项中哪些是常用的吊索绑扎法（）。

A、平行吊装绑扎法

B、垂直斜形吊装绑扎法

C、兜挂法

D、直接吊装法