You have a large,broken-down vessel in tow with a wire rope and anchor cable towline. Both vessels have made provision for slipping the tow in an emergency; however,unless there are special circumstances().
A. the towing vessel should slip first
B. the vessel towed should slip first
C. they should slip simultaneously
D. either vessel may slip first
关于传输中用到的光纤,下面说法错误的是()
A. 传输用到的光纤一般有多模和单模两种
B. 单模光纤传输距离远,最远可达70KM
C. 多模光纤的纤芯比单模的纤芯要细
Ping()诊断TCP/IP协议是否成功安装、ping可以诊断网卡是否正常(WindowsXP中要连网后才能ping通)、ping诊断是否可以连接到Internet。
在“发出/收到委托收款/托收承付提示交易”画面中,如果需要对发出的委托收款信息进行补充录入、删除、维护,哪个栏位是必输项()。
A. 收发标识
B. 委托类型
C. 委托方式
D. 业务编号