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【华慧考博】考博英语每日一练（12.3）考博加油！
1. An explanation of an earthquake is a description of the chain of_______ that produces it.A. causality
B. margin
C. persistence
D. purpose
2. Although most dreams apparently happen______, dream activity may be provoked by external influences.
A. spontaneously
B. simultaneously
C. homogeneously
D. instantaneously
【考博英语句子改错练习】
1. Because of the rising cost of fuel, scientists are building automobile engines who will conserve gasoline but still run smoothly.
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