用铈量法测定H2SO4介质中Fe2+，当滴定至化学计量点的电位值为（）（φ＇Fe3+

It is reported that two schools, ___   are being built in my hometown, will open next year.[      ]

A. they both  

B. both of them  

C. which both  

D. both of which

感光胶片中的全色片是一种（）。

材料一：美国的次贷危机波及全球。在全球化的大背景下，在中美经济关系空前密切的条件下，中国也难免不受影响。

材料二：从世界角度而言，中国和发展中国家市场继续增长的前景也有助于抵御其他地区出现的不利影响。如90年代末期的亚洲金融危机时期那样，中国有望再次成为一个“定海神针”。

材料三：而对于中国而言，这次全球金融危机反而很有可能提供了一个契机。由于中国当前较为严格的资本管制，将使中国以相对较小的损失获得调整自身经济结构的动力，为进一步“和平崛起“创造有利条件。这是中国真正融入国际体系，成为国际体系的一个“利益相关者”的良机。

（1）以上材料共同说明了第三单元那两个观点？

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（2）作为当代中学生我们应该以什么态度来面对全球化的金融危机？

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我国迄今发现最重的一件青铜器是下列哪一个？（）

A、大盂鼎

B、虢季子白盘

C、妇好三联甗

D、司母戊鼎

Although there are many skillful Braille readers, thousands of other blind people find it difficult to learn that system. They are thereby shut (1) from the world of books and newspapers, having to (2) on friends to read aloud to them.

A young scientist named Raymond Kurzweil has now designed a computer which is a major (3) in providing aid to the (4) .His machine, Cyclops, has a camera that (5) any page, interprets the print into sounds, and then delivers them orally in a robot-like (6) through a speaker. By pressing the appropriate buttons (7) Cyclops’s keyboard, a blind person can "read" any (8) document in the English language.

This remarkable invention represents a tremendous (9) forward in the education of the handicapped. At present, Cyclops costs $ 50,000. (10) , Mr. Kurzweil and his associates are preparing a smaller (11) improved version that will sell (12) less than half that price. Within a few years, Kurzweil (13) the price range will be low enough for every school and library to (14) one. Michael Hingson, Director of the National Federation for the Blind, hopes that (15) will be able to buy home (16) of Cyclops for the price of a good television set.

Mr. Hingson’s organization purchased five machines and is now testing them in Maryland, Colorado, Iowa, California, and New York. Blind people have been (17) in those tests, making lots of (18) suggestions to the engineers who helped to produce Cyclops.

"This is the first time that blind people have ever done individual studies (19) a product was put on the market," Hingson said. "Most manufacturers believed that having the blind help the blind was like telling disabled people to teach other disabled people. In that (20) , the manufacturers have been the blind ones.

4（）

A.paralyzed

B.uneducated

C.invisible

D.sightless