可作为氯霉素滴眼剂pH调节剂的是( )。 A．10%HCl B．硼砂 C．尼泊金甲

依次填入下列横线处的词语，最恰当的一组是（  ）

①沈从文的小说《边城》笔力传神，寥寥数语，就将众多人物的性格     得淋漓尽致。

②爱丽丝·门罗被誉为“当代最伟大的短篇小说家”，虽然注重对成长疼痛与生老病死等严肃话题的关注，但文字却     着泥土的芳香。

③我们必须看到，当代文化的这种转向     与电子传媒的兴起息息相关，但促成这种转向的实现还有更为深刻的现实原因和社会背景。

A．描绘充斥纵然

B．刻画充斥纵然

C．刻画充溢固然

D．描绘充溢固然

阅读理解

     WASHINGTON: An analysis of global temperatures by independent statisticians shows the Earth is

still warming and not cooling as some global warming skeptics are claiming.

     The analysis was conducted at the request of The Associated Press to investigate the legitimacy of

talk of a cooling trend that has been spreading on the Internet, fueled by some news reports, a new book

and temperatures that have been cooler in a few recent years.

     In short, it is not true, according to the statisticians who contributed to the analysis.

     The statisticians, reviewing two sets of temperature data, found no trend of falling temperatures over

time.US government data show the decade that ends in December will be the warmest in 130 years of

record-keeping, and 2005 was the hottest year recorded.

     The case that the Earth might be cooling partly stems from recent weather. Last year was cooler than

previous years. It has been a while since the superhot years of 1998 and 2005. So is this a longer climate

trend or just weather's normal ups and downs?

     In a blind test, the AP gave temperature data to four independent statisticians and asked them to look

for trends, without telling them what the numbers represented. The experts found no true temperature

declines over time.

     "If you look at the data and sort of cherry-pick a microtrend within a bigger trend, that technique is

particularly suspect," said John Grego, a professor of statistics at the University of South Carolina.

     Yet the idea that things are cooling has been repeated in opinion columns, a BBC news story posted

on the Drudge Report and in a new book by the authors of the best-seller Freakonomics. Last week, a

poll by the Pew Research Center found that only 57 percent of Americans now believe there is strong

scientific evidence for global warming, down from 77 percent in 2006.          

1. The first paragraph serves as a (n) _______.

A. explanation      

B. introduction        

C. comment        

D. background

2. According to the passage ,the hottest year in 130 years of record-keeping is _____ .

A. 1998            

B. 2005              

C. 2006            

D. 2010

3. How many factors lead to the idea that the earth is cooling?

A. 2              

B. 3                    

C. 4                

D .5

4. We can learn from the passage that _____.

A. five independent statisticians were given temperature data to look for trends

B. more and more Americans now believe there is strong scientific evidence for global warming

C. The analysis of global temperatures was required by the independent statisticians

D. The earth is not becoming cooler as some people are claiming on the internet

欲寻求新的催化剂和制造耐高温、耐腐蚀的合金材料，应对元素周期表中进行研究的元素是（　　）

A．碱金属

B．主族元素

C．金属与非金属分界线附近的元素

D．过渡元素

多媒体信息不包括( )。

A．影像、动画

B．文字、图形

C．音频、视频

D．声卡、光盘