操作中,为使人体与机器设备的高度相适应,应增加脚踏板。这一做法符合()的原理。
A、人机工程学
B、视觉要求
C、工厂要求
参考答案:A
Not until his father died ____ what his father really meant. [ ]
A. do they realize
B. did they realize
C. realized they
D. had they realized
(1).药品净重精确称量至0.1g()。(2).发放必须在指定的取样室进行()。(3).进货时当即发放()。(4).按照领料单备齐,放到备料区()。
A.一般物料发放
B.特殊物料发放
C.两者均是
D.两者均不是