The unit of (measurement) known as foot (has) originally based on the average (s

游客2025-03-16 25

问题 The unit of (measurement) known as foot (has) originally based on the average (size) of the human (foot).

选项 A、measurement
B、has
C、size
D、foot

答案 B

解析应改为was。根据句意：“英尺这个测量单位原先是以人脚的平均长度为依据的”。此处不应该用完成时，而应该用一般过去时。

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