拔键震荡器是由（）部分组成的。 A.2 B.3 C.4 D.5

一群在海滩边嬉戏的孩子的口袋中，共装有25块卵石。他们的老师对此说了以下两句话：第一句话：“至多有5个孩子口袋里装有卵石”；第二句话：“每个孩子的口袋中，或者没有卵石，或者至少有5块卵石”。
以下哪项关于老师两句话关系的断定一定成立
Ⅰ．如果第一句话为真，则第二句话为真。
Ⅱ．如果第二句话为真，则第一句话为真。
Ⅲ．两句话可以都是真的，但不会都是假的。

A．仅Ⅰ。
B．仅Ⅱ。
C．仅Ⅲ。
D．仅Ⅰ和Ⅱ。
E．仅Ⅱ和Ⅲ。

下列词语中加点的字注音全都正确的一组是(      )

A．强劲(jìn)择菜(zhái)订正(dìng)扰动(rǎo)

B．挫折(cuò)刹那(chà)似的(sì)病菌(jūn)

C．蜕变(tuì)连累(lèi)支撑(chēng)马匹(pǐ)

D．编纂(zuǎn)崇拜(chóng)迫切(pò)模糊(mó)ǔ、xián；C项读音分别为：mèi/jué、chì、chuò；D项的读音分别为：huái、xuè/xiè、qiè。

肺心病呼吸衰竭急性加重期治疗的关键是

A．强心苷的及时应用

B．选择适当的利尿药

C．加强护理

D．控制呼吸道感染，改善呼吸功能

E．应用呼吸兴奋剂

腹腔穿刺液中有大量中性粒细胞，革兰染色阴性杆菌

A．原发性腹膜炎
B．胃、十二指肠穿孔
C．阑尾炎穿孔
D．肝脾破裂
E．出血坏死性胰腺炎

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.