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

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

admin2008-11-13  71
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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