某古代学者要从春意盎然中体会万物生生不息的根源，也就体悟“天地生物之心”，并借此明白

下列各句中，没有语病的一句是[ ]

A．国家发改委近日下发《关于做好城市供水价格管理工作有关问题的通知》，《通知》要求：水价调整要循序渐进、统筹规划、分步到位。

B．历史告诉我们，对科学的是非之争只应按“持之有故，言之有理”的原则去百家争鸣，任何背离这一原则的行为都是荒唐的。

C．作为一位杰出的哲学家和思想家，孔子一生积极求索，他奋斗的一生是“知其不可为而为之”这句格言的真实写照。

D．中国青少年心理成长基地是国际首家采用心理、医学、军训、教育、社会体验“五位一体”的模式，诊治网瘾、厌学及各种心理问题的有效手段。

(三级)下列不属于邮政物流业务服务范围的是（）。

A、各种物品的分拣 

B、各种物品的流通加工 

C、各种物品的运输 

D、代上保险

工人用如图所示的装置将重物提高2m，已知物重为500N，人对绳的拉力为300N。

求此过程中：

⑴做的总功。

⑵滑轮组的机械效率。

⑶若不计绳重和摩擦，动滑轮的重力。

常用的组织固定方法错误的是（）

A.蒸汽固定法

B.注射灌注固定法

C.浸入固定法

D.紫外固定法

E.微波固定法

Today more and more people go to websites when looking for information. Although most readers go to websites for news and e-mail, a form of person-to-person news, or in the form of chatting, they also read books on the web. It’s called electronic book (e-book).

Electronic books could revolutionize reading, but people ought to consider their far-reaching impacts as well. "The e-book promises to cause a slow tragedy on life as we know it," Jason Ohler, professor of technology assessment, university of Alaska Southeast In Juneau, warned the World Future Society, Bethesda, Md. His assessment weighed the pros and cons (赞成和反对的理由) of e-book technology’s impact on social relationships, the environment, the economy, etc. Before you curl up (蜷曲) with an e-book, consider the disadvantages.

They increase eyestrain due to poor screen resolution, replace a relatively cheap commodity with a more expensive one, and displace workers in print-book production and traditional publishing. E-books make it easy to share data, thereby threatening copyright agreements and reducing compensation (补偿) of authors, as well as creating nonbiodegradable (不可生物降解) trash.

On the other hand, e-books save paper and trees, reduce the burden of the carrying and storing of printed books, promote self-sufficiency in learning, and make reading a collaborative experience online. They also create new jobs for writers and artists and encourage self-publishing. In final analysis, Ohler points out, e-books should gain society’s approval if a few conditions are met: make them biodegradable and recyclable, solve the problem of eye fatigue, be sure the "have-nots" get the technology, and support e-book training in schools and business.

In what sense do e-books exert a negative impact on the environment().

A. They are unable to be broken down into harmless products.

B. They consume a lot of natural resources.

C. They produce harmful gases.

D. They are capable of being reused.