It is A(estimated) that a scientific principle has B(a life expectancy) of appro

游客2025-04-24  0

问题 It is A(estimated) that a scientific principle has B(a life expectancy) of approximately C(a decade) before D(it drastically) revised or replaced by newer information.

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答案 D

解析 it drastically改为it is drastically,用被动语态。
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