更多"1 The Earth might have been sent i"的相关试题:
[单项选择]1 The Earth might have been sent into an ice age by the break-up of a supercontinent 750 million years ago, creating a global snowball.
2 The break-up probably caused an increase in rainfall and weathering of rock, say climatologists. This would have sucked greenhouse gases out of the atmosphere and caused a run-away cooling effect. The mechanism could explain how the entire planet becomes encased in a mass of ice, as many researchers think it has done in the past.
3 The theory that the Earth was once completely frozen emerged in the 1960s, when scientists realized that global freezing could happen if the polar ice sheets grew above a certain threshold size. Because bright ice reflects sunlight and heat back into space, growing ice sheets cause further cooling. This feedback loop could tip the climate system into a deep freeze.
4 The planet could eventually thaw as carbon dioxide from volcanoes poking through the ice warm it.
5 In the late 1980s, Joe Kirschv
[填空题]I have been sent here by the American Shipping Company to talk with you about transportation．
[填空题]In China, most talented students have been sent abroad to ______ -- chiefly at the graduate level.
[填空题]"Ice Age: The Meltdown" is a follow-up of "Ice Age" which was shown in 2002.
[填空题]Real-time deep-sea images have never been sent to the globe before the using of communications technologies.
[填空题]The Little Ice Age lasted for several years.
[填空题]How many quarts of ice cream have been eaten by Americans ’in one year
The Americans eat more than ______quarts of ice cream in a year.
[单项选择]What was characteristic of the "Little Ice Age"
A. Cold and damp climate.
B. Change in geographic conditions.
C. World-wide drought.
D. Reduction of water resources.
