题目内容
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提问人:网友nel7878
发布时间:2022-01-07
[主观题]
An avoidable cost is a cost that can be eliminated, in whole or in part, by choosing one alternative over another
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A、Statistics showing that it takes less time for the same student to understand the target materials than he previously did of a similar piece of material.
B、Students’ own testimony.
C、The causes behind this improvement of efficiency.
D、A contrast group that shows a student following the old teaching method not doing as well as the tested student.
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