【单选题】______is known to us all, only the theory ______ on practice can be practical.
【单选题】食物蛋白质的消化产物氨基酸,最主要的生理功能是
【判断题】如果是需要发遥控信号的断路器事故跳闸, KM2.3 闭合启动遥信装置,发遥信至中心调度所
【单选题】美国沃尔玛连锁超市将尿布和啤酒摆在一起销售,致使尿布和啤酒销量双增,是因为美国妇女们经常会嘱咐她们的丈夫下班后要为孩子买尿布,而丈夫买完尿布后会顺手买回自己喜爱喝的啤酒,此种营销方式属于( )
【单选题】Which of the following is not talked in the passage as which can help us communicate?
【单选题】Any friction fit, tightness or adhesion of the part of any load being lifted should be broken by wedge or tapping and not by increasing the load on the applianceAccording to this sentence, .
A.
the lifting appliance can always lift the freight within its rated load
B.
attention should be paid in order not to break the wedge when lifting cargo
C.
sometimes the lifting work needs other assistance other than the lifting appliance
D.
lifting work should be done with every part fit, tightness or adhesion