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Cet-6-1.17-Exercise 01Yet there are doubts whether people watching television, a “lean back” medium, crave interaction. Click-through rates have been high so far (around 3–4%, compared with less than 0.3% online), but that may be a result of the novelty. Interactive ads and viewers might not go well together. How does the author view the hitherto high click-through rates?

A. They point to the growing curiosity of TV viewers.
B. They may be due to the novel way of advertising.
C. They had no chance to touch them when shopping online.
D. They had to tighten their belts.

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Cet-6-1.17-Exercise 02Economic inequality is the “defining challenge of our time,” President Barack Obama declared in a speech last month to the Center for American Progress. Inequality is dangerous, he argued, not merely because it doesn’t look good to have a large gap between the rich and the poor, but because inequality itself destroys upward mobility, making it harder for the poor to escape from poverty. “Increased inequality and decreasing mobility pose a fundamental threat to the American Dream,” he said. How does Obama view economic inequality?

A. It is the most malicious social evil of our time.
B. It is a positive response to changed circumstances.
C. It is the biggest obstacle to social mobility.
D. It is an attempt to combat the economic recession.

各叶脉从叶基互相平行发出直达叶端

A. 羽状网脉
B. 掌状网脉
C. 直出平行脉
D. 羽状平行脉
E. 叉状脉

芭蕉叶的脉序是

A. 叉状脉序
B. 直出平行脉
C. 横出平行脉
D. 射出脉序
E. 弧形脉

叶轴作一次分枝,在分枝上又形成羽状复叶,这种叶成为

A. 一回羽状复叶
B. 三回羽状复叶
C. 二回羽状复叶
D. 叉状羽状复叶
E. 四回羽状复叶

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