We are convinced that we are on the______of an important discovery.A、thresholdB

游客2025-04-05  0

问题 We are convinced that we are on the______of an important discovery.

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

答案 A

解析 A项“threshold开始,开端”符合题意。其他三项“B项household家庭,家人;C项thread线,线索,思路;D项entrance入口,入门”都不正确。本题空格处是说开始了个重要的发现。因此A项为正确答案。
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