【单选题】He is to lift heavy things.
【单选题】The main reason(s) for an exporter to consistently offer quotes in the importer’s currency is that it makes it easier for the importer ___.
A.
to determine what its actual costs will be
B.
to avoid currency fluctuation risks
C.
to be able to use its own bank
【单选题】The word rentable in paragraph 4 is closest in meaning to
【简答题】平面四杆机构中,若各杆长度按顺序分别为a=40 mm,b=90 mm,c=80 mm,d=100mm,当以a为机架时该四杆机构为( )
【简答题】平面四杆机构中,若各杆长度按顺序分别为a=40mm, b=90mm, c=80mm,d=100mm, 当以a为机架时该四杆机构为__机构。
【单选题】He keeps all his documents in a _______ box. [ ]
【判断题】车削加工时当其它切削条件不变,进给量增加会使表面变得更粗糙。
【简答题】平面四杆机构中 , 若各杆长度按顺序分别为 a=40mm,b=90mm,c=80mm,d=100mm, 当以长度 a 做机架时该四杆机构为 ______ 机构。