单项选择题

According to the second paragraph, the formation of the Atlantic Ocean is the example of _______.

A．spreading contacts
B．the influence of volcanic eruptions
C．converging contacts
D．transform contacts
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单项选择题
This passage is probably _______.
A．a newspaper advertisement
B．a chapter of a novel
C．an excerpt from a textbook
D．a scientific report of new findings
单项选择题
The Earth's crust _______.
A．can be classified into two types
B．is formed along the margins of the plates
C．consists of semi-molten rocks
D．is about 70 to 100 kilometers thick
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