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【华慧考博】考博英语每日一练（7.18）考博加油！
1. Two of the greatest breakthroughs in knowledge—atomic fission and DNA—have brought two of the greatest perils: the ______ of nuclear weapons and the risk of human cloning.A. percolation
B. proliferation
C. prosperity
D. acceleration
2. Studies have shown that workers’ desire to be accepted by co-workers could ______ them more strongly than the desire to earn more money.
A. hamper
B. motivate
C. intervene
D. streamline
【考博英语补全句子】
1. ________ __________（目前）he is a professor of mathematics at Cambridge.
2. He was late ________ _________（因为）the heavy rain.
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