We are convinced that we are on the ______of an important discovery.(2004年上海理工大学

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问题 We are convinced that we are on the ______of an important discovery.(2004年上海理工大学考博试题)

选项 A、threshold
B、household
C、thread
D、entrance

答案 A

解析本题空格处是说开始了一个重要的发现。A项“threshold开始，开端”符合题意。其他三项“household家庭，一家人；thread线、线索，思路；entrance入口，入门”都不正确。

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