1. By tug-of-war, the author means _________.
[A]the different effect of solar dimming and global warming
[B]the impact of the solar dimming on the climate system
[C]the influence of the solar dimming on the global warming
[D]the interaction between the solar dimming and global warming
2. How do the scientists feel about the current climate situation?
[A]Serious.
[B]Optimistic.
[C]Carefree.
[D]Panicked.
3.When mentioning It s like we have a new gorilla sitting down at the table, the author implies that __________.
[A]scientists should have a close look at the solar dimming problem
[B]we are facing a new problem which is very complicated and difficult to manage
[C]we are just beginning to have research on this new field
[D]the new solar dimming problem is beyond scientists ability to tackle
4. Which of the following cannot serve as a factor of causing the cooling surface of the
planet?
[A]The lack of the rain in the earth.
[B]The increasing of the pollutants.
[C]The forming of the cloud droplets.
[D]The less weight of the cloud droplets.
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