已选分类
工学林业工程
单选题The first step in harvesting a timber is ______. A. Delimbing B. Felling C. Bucking
单选题Delimbing gate works as ______. A. Single-stem delimbing with transverse feeding B. Multi-stem delimbing with lengthwise feeding C. Multi-stem delimbing with transverse feeding
单选题水曲柳树种为( )。 A．散孔材 B．半散孔材 C．环孔材 D．半环孔材
单选题深虫眼是指昆虫蛀蚀原木的深度自( )以上的虫眼。 A．1mm B．10mm C．3mm D．30mm
单选题Generally, machine utilization rate should be ______ machine mechanical availability. A. less than or equal to B. greater than or equal to C. always equal to
单选题对原木材色、光泽、纹理进行检验时，主要使用( )检验方法。 A．视觉 B．听觉 C．嗅觉 D．触觉
单选题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
单选题If the timber has been purchased on a lump-sum basis, inattention to bucking decisions can create large financial losses to ______. When timber has been purchased on a (per unit of volume) harvested basis, the losses associated with miss cut logs are borne by the ______. A. timber buyer, landowner B. landowner, timber buyer C. forest manager, logger
单选题According to the way the machine operated, the felling machine can be classified into ______. A. three-wheel machine vs. four-wheel machine B. drive to tree machine vs. swing to tree machine C. saw-head machine vs. shear-head machine
单选题椴木树种管孔分布的特征为( )。 A．散孔材 B．半散孔材 C．环孔材 D．半环孔材
单选题深虫眼是指昆虫蛀蚀圆材的深度自( )以上的虫眼。 A．1mm B．10mm C．3mm D．3cm
单选题When timber has been purchased on a (per unit of volume) harvested basis, the losses associated with miss cut logs are borne by the ______. If the timber has been purchased on a lump-sum basis, inattention to bucking decisions can create large financial losses to A. landowner, timber buyer B. timber buyer, landowner C. forest manager, logger
单选题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