问题 选择题

下图为卢瑟福和他的同事们做α粒子散射实验的装置示意图,荧光屏和显微镜一起分别放在图中的A、B、C、D四个位置时,关于观察到的现象,下列说法中正确的是(    )

A.相同时间内放在A位置时观察到屏上的闪光次数最多

B.相同时间内放在B位置时观察到屏上的闪光次数只比放在A位置时稍少些

C.放在C、D位置时屏上观察不到闪光

D.放在D位置时屏上仍能观察到一些闪光,但次数极少

答案

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卢瑟福和他的同事们做α粒子散射实验时,得到以下结论:大部分α粒子都能直接穿过金箔,个别的发生偏转,极少数发生大角度的偏转,故A、D正确,B、C错误.

单项选择题
单项选择题

Rarely has there been as neat a fit between a book’s subject and its author’s biography as in "Bound Together: How Traders, Preachers, Adventurers, and Warriors Shaped Globalization" by Nayan Chanda. It’s easy to see why the subject fascinates Chanda; he’s a self-proclaimed Francophile(崇拜法国的人) of South Asian origin, who studied French in Calcutta, then took courses on China in Paris, ran a magazine in Hong Kong and ended up launching an online journal devoted to globalization at a venerable Ivy League institution. And in this engaging analysis, he answers such intriguing questions as" How did the coffee bean, first grown only in Ethiopia, end up in our coffee cups after a journey through Java and Colombia"

In examining these specific questions -- and larger ones about how the world is interconnected m Chanda does not emphasize his own experiences. But when appropriate, he effectively uses small, personal details to cut very big social, economic, cultural and sometimes biological processes down to size. He shows how close scrutiny of the iPod he gave his son as a birthday present can reveal much about the multinational origins of such objects. It was officially touted as" designed" by an American company and "assembled in China"; he found that it actually contained component parts and software with ties to India, Japan, South Korea and Scotland. And he marvels at the speed with which it traveled from Shanghai to New haven via Alaska and Indiana, as well as at his ability to track its progress thanks to bar codes.

The debate over globalization has grown so polarized that many readers are probably itching to know whether Chanda belongs in the" pro" or" anti" camp. One theme of "Bound Together" is that thinking in these terms doesn’t make sense. Those who gather at what are somewhat misleadingly called" anti- globalization" rallies, after all, don’t oppose all the ways the world is shrinking. And their campaigns make use of many technologies (notably the Internet) that are crucial to 21st-century-style globalization.

Indeed, Chanda’s stand on the subject might be called that of a cautiously optimistic fatalist. He asserts that the only reasonable response to globalization is twofold: accept that the world is not going to stop shrinking and figure out ways to maximize the positive and minimize the negative effects. He acknowledges the downsides of globalization (social inequities, the spread of new diseases and so on), yet argues that in many ways being "bound together" ever more tightly can ultimately be a good thing, benefiting more and more individuals and groups.

This is a book filled with fascinating information. Even readers who disagree with his claims will come away with a host of new facts to draw upon. They will also learn a lot about the history and deployment of the term globalization, to which Chanda devotes an excellent chapter. In addition, many will never look at an iPod in quite the same way again.

In the author’s opinion, those who oppose globalization are ()

A. against all the ways and means related to it

B. not accepting the reality of a shrinking world

C. misunderstood for the name of their camp

D. against the technologies typical of globalization