单项选择题

A．They go out a lot more in the winter.
B．They prefer to teach people in winter,
C．They know when a river is too dangerous.
D．They never try rivers graded from one to five.
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单项选择题
Why did the author mention the example of Kodak
A．to show that Kodak lacked knowledge of the Chinese camera market.
B．to illustrate Kodak"s tortuous road to success.
C．to show that Chinese middle class has leapfrogged from film camera to digital camera.
D．to exemplify that failure to anticipate leapfrogs may result in business losses.
单项选择题
Which of the following can NOT be concluded from the statement it is harder to talk about immigration as an economic issue. (Para. 4)
A．Immigration is often considered as a political or social issue rather than an economic issue in Britain.
B．Immigrants do not have noticeable impact on British economy.
C．Immigrants" contribution to the prosperity of Britain is often neglected.
D．In America, the issue of immigration is mainly about its economic implications.
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