【单选题】Small sailboats can easily turn over in the water ________.
A.
if not managed carefully
B.
if are not managed carefully
C.
unless not managed carefully
D.
unless are not managed carefully
【判断题】人工费中包括材料采购及保管人员、驾驶施工机械和运输工具的工人的工资。 ( )
【判断题】科学家研究发现,40赫兹的长低音容易使人安静下来。()
【单选题】Small sailboats can easily turn over in the water _____ they are not managed carefully. [ ]
【简答题】Small sailboats can easily turn over in the water ______ they are not managed carefully. A.though B.before C.until D.if
【单选题】许多网络通信需要进行组播,以下选项中不采用组播协议的应用是(62)。在IPv4中把(63)类地址作为组播地址。
【单选题】许多通信需要进行组播,以下选项中不采用组播协议的应用是(62)。在IPv4中把(63)类地址作为组播地址。
【判断题】组织设计中经常运用的部门划分的标准是:职能、产品和地区。