国家环境基础标准包括（）。 A.标准中需要统一的信息编码 B.编制环境质量标准和排放

某房地产经纪公司接受二手住宅楼销售委托，由经纪人张某到现场进行勘察得知：该住宅楼为7层，层高3m，房屋竖向承重构件采用砖墙和砖柱，水平承重构件采用钢筋混凝土楼板，外窗为钢窗，建成于20世纪80年代，六成新，一部电梯。该住宅楼地基土均匀稳定，承载力好。

该房屋建筑的结构类型为（）。

A.砖木结构

B.砖混结构

C.钢筋混凝土结构

D.钢结构

S₁增强常见于

A．二尖瓣狭窄

B．二尖瓣关闭不全

C．主动脉瓣狭窄

D．主动脉瓣关闭不全

E．肺动脉瓣狭窄

Reading comprehension.

     Many experts complain that media too often take advantage of the science fiction aspects of nanotech (纳

米技术). Reports of nanotech often refer to K. Eric Drexler's book Engines of Creations, which predicts an

age full of dominant molecular (分子的) manufacturing and a world without material scarcity. Whatever

humans need will one day be built cheaply with microscopic self-replicating machines (微细自我复制机) that

put atoms together to create copies of anything alive in the world-from trees to human bodies.

     In fact, the scientific community is deeply divided over whether self-replication machines are possible. If

they are, major dangers could exist. Mr. Drexler himself thought that self-replicating machines could probably

go out of control. He writes in his book that man-made "plants" with "leaves no more efficient than today's solar

cells could win over real plants,crowding the earth with leaves that are not suitable to be eaten. Tough 'bacteria'

could be more competitive than the real bacteria: They could spread everywhere, replicate swiftly, and reduce

the earth to dust in a matter of days."

     Critics of nanotech have made use of such images, calling for a delay on commercial nanotech until

regulations are established. They also point to the possible military uses of nanotech. Bill Joy, the co-founder of

Sun Microsystems, wrote in a Wired magazine essay in 2000 that if nanotech falls into the wrong hands, it could

bring dangers to society.

     Opponents say Mr. Joy is overreacting. "In a way, calling for bans on research into molecular manufacturing

is like calling for a delay on faster-than-light travel because no one is doing it," says Glenn Reynolds, a University

of Tennessee law professor.

     Professor Reynolds says it is a good idea to regulate nanotech, but in ways the government would regulate

any products that could be dangerous. Export controls and certification systems for nanotech companies are

examples. US lawmakers have put forth four bills on nanotech research and development.

1. K. Eric Drexler in his book predicts a future world with sufficient material, because _____.

A. man-made plants could replace real plants and grow more quickly

B. plants produced by nanotech would be as efficient as today's solar cells

C. man-made bacteria would be widespread and capable of self-replicating

D. humans could create copies of anything alive with high technology

2. To call for a delay on commercial nanotech, critics of nanotech make use of _____.

A. current social problems

B. science fiction descriptions

C. disagreements in the scientific community

D. the fact that no one is doing molecular manufacturing

3. Opponents of Bill Joy would NOT agree to _____.

A. control nanotech export

B. ban nanotech research to avoid any possible dangers

C. put forth bills on nanotech research and development

D. establish a certification system for annotech companies

4. Which of the following statements best summarizes the main idea of the passage?

A. Nanotech should not be put into wrong use in the military field.

B. The government should regulate products that could be dangerous.

C. Nanotech regulations should be established in spite of the divided opinions.

D. The media should not take advantage of the science fiction aspects of nanotech.

为征求对《政府工作报告（征求意见稿）》，2008年1月21日至25日，国务院 * * 温 * * 在 * * 主持召开五次座谈会，敞开大门，邀请基层代表商讨国计民生，征求对即将提请十一届全国人大一次会议审议的《政府工作报告》(征求意见稿)的意见。这一情况表明（ ）

A．国家机构坚持民主集中制原则

B．多党协商是社会主义民主政治的重要特点

C．依法治国方略得到进一步贯彻落实

D．社会主义民主政治建设取得重大突破

空气呼吸器适用于抢险人员在毒气、浓烟、缺氧的各种环境中安全有效的进行灭火、抢险和救护工作。（）