The ratio of width to depth must be 30 or more at each point.
A.每一个点处的宽度和深度值不能小于30. B.每一个点处的宽深值不能大于30. C.每一个点处的宽深比不少于30正确答案C
The ratio of width to depth must be 30 or more at each point.
A.每一个点处的宽度和深度值不能小于30. B.每一个点处的宽深值不能大于30. C.每一个点处的宽深比不少于30正确答案C
