单项选择题

It can be inferred from the passage that evidence for continental drift has been provided by the

A． correspondences between coastal contours
B． proof of an original solitary land mass
C． level of sima underlying the continents
D． immobility of the African continent
E． relative heaviness of the continental masses
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单项选择题
For centuries, physicists have had good reason to believe in the principle of equivalence propounded by Galileo: it has ______ many rigorous tests that ______ its accuracy to extraordinary precision.
A． endured...compromised
B． passed...presupposed
C． borne...postulated
D． survived...proved
E． inspired...equated
单项选择题
The passage presents information that would answer which of the following questions
A． In what ways do the coastlines of Africa and South America differ from one another
B． How much lighter than the substratum of igneous rock below them are the continental masses
C． Is the rotation of the globe affecting the stability of the present-day continental masses
D． According to Wegener's theory, in what direction have the Americas tended to move
E． How does Wegener's theory account for the apparent immobility of the African continent
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