A、It was eroded by some chemicals.B、The scales are obscure.C、The standard for

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问题

选项 A、It was eroded by some chemicals.
B、The scales are obscure.
C、The standard for measuring had changed.
D、It absorbed moisture and was inaccurate.

答案 D

解析

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A、Itwaserodedbysomechemicals.B、Thescalesareobscure.C、Thestandardfor