1931年,美国的( )在《工业事故预防》一书中,阐述了工业安全理论。
A.法默
B.吉布森
C.海因里希
D.伍兹
参考答案:C
--Good morning. How much should I pay for these books ________ to Alabama?
-- Hm, about ten dollars.
A.being sent
B.to be sent
C.sent
D.having been sent
什么是设备报废?报废价值和残余价值的区别是什么?