当轿厢载有()额定载荷并以额定速度下行时,切断电动机和制动器电源,电梯应可靠停止.
A.125%
B.150%
C.130%
D.200%
参考答案:A
It’s a ____coincidence that the day before his retirement, my English teacher will have been teaching
for a total of forty years.[ ]
A. serious
B. cautious
C. curious
D. previous
物业管理成本按照与决策的关系划分中,( )成本是指在一定物业管理服务量水平下,增加或减少一个单位服务量所引起成本总额的变动数,用以判断增减服务量在经济上是否合算。
A.边际
B.机会
C.估计
D.差异