(三空)Currently, pumps that could boost the natural pressure sufficiently to drive
the crude through a pipeline to the shore do not work (i)____ because of the
crude’s content. Crude may consist of oil or natural gas in (ii)___
states—combinations of liquids, gases, and solids under pressure—that do
not reach the wellhead in (iii)___ proportions. The flow of crude oil, for
example, can change quickly from 60 percent liquid to 70 percent gas.
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A consistently D monotonous G constant
B simultaneously E multiphase H different
C successively F derivative I large
就是第一空 不懂 successively和constantly 区别在哪里 感觉意思一样 为什么答案是AEG呢?