单项选择题

At a standard lumber mill, the first grading choice for hardwood is the ______.
 A.Factory Class  B.Veneer Class  C.Sawlog Class

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单项选择题
The major forest products include ______. A.full treE. long log. short log, chip B.full treE. round log. short log, chip C.whole treE. long log. short log, sawtimber
单项选择题
Diameter at breast height is usually measured at ______ above ground level . A.1.5m B.1.4m C.1.3m
A.5m
B.4m
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