A、农业
B、工业
C、矿产业
D、制造业
WhichofthefollowingstatementsisNOTafactaboutAlvin?
A.Itcancarryexplorersasdeepas6,500meters.
B.Ithasplayedakeyroleinvariousimportantunderseaexpeditions
C.Itwaslaunchedinthesixtiesofthetwentiethcentury.
D.Ithasbeenusedformorethan40years.
请帮忙给出正确答案和分析,谢谢!
在计算机技术广泛应用以前,在组织结构的低层管理幅度一般为多少人()
请帮忙给出正确答案和分析,谢谢!