单项选择题

IMPECUNIOUS:

A． atrocious
B． venomous
C． prosperous
D． comfortable
E． receptive
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单项选择题
Which of the hypothetical discoveries would MOST likely shed doubt on the author's claim that field regeneration could be responsible for the earth's magnetic reversals
A． Extreme fluctuations in the dynamo processes are discovered to be exceedingly rare, if they occur at all.
B． Magnetic field lines are discovered to diffuse very poorly through the earth's outer core.
C． Realignment of the earth's magnetic polarity is discovered to occur much more frequently than was previously believed.
D． Molten iron is discovered to be a poorer electrical conductor than was previously believed.
E． The earth's core is found to move at a much faster rate than had previously been measured.
单项选择题
PATINA:
A． inherent feature
B． insignificant scrutiny
C． coincidental happening
D． new achievement
E． unfinished task
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