单项选择题

Questions 19-22

A．The Walnut Tree.
B．The Europa Hotel.
C．The Maltravers.
D．Undecided.
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单项选择题
The article was written to explain ______.
A．the greenhouse effect
B．the solar effects on the earth
C．the models of solar-weather interactions
D．the causes affecting weather
问答题
今年的前9个月，双边贸易总额为190亿美元，与去年同期相比，有35%的增长。
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