The word "cinch"(Line3, Para.1)most probably means
A. a very easy thing.
B. a very complex thing.
C. a great challenge.
D. an extremely hard problem.
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股利稳定增长模型中，每股股票的股利增长率越大，股票价值越大。()
Which of the following is true according to the first two paragraphs？
A. The U. S. schools don"t want the parents know their plans for disasters.
B. Parents should push schools to make reasonable plans for disasters.
C. The U. S. schools have done too little to prepare for disasters.
D. Most U. S. parents do not know the disaster preparedness plan of their children"s schools.
According to the second paragraph,
A. schools should do more in their disaster preparedness.
B. the government has been well prepared for disasters.
C. parents do not care about their children enough.
D. schools" former plans for disasters do not make sense at all.
It can be inferred from the second paragraph that
A. low-altitude clouds are the main causes of global warming.
B. increase of cloud cover can slow down the climate change.
C. global warming will increase cloud cover.
D. increase of cloud cover can speed up the global warming.
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