搜题请搜索小程序“爱下问搜题”
问题 单项选择题

水运交通事故的发生与外界条件、技术保障、不良的航行条件、导航失误等因素密切相关，技术故障主要有船舶动力装置和电力系统技术故障、操舵及螺旋桨遥控装置失控、惰性气体系统故障、导航设备故障和（　　）。

A．船舶避让操纵失误

B．航路标志故障

C．航海图资料失效

D．通信设备故障

答案

参考答案：D

单项选择题

Although the bulk of industry resources and energies have focused on developing the fastest (71) or slickest (72) , more and more mindshare is turning to the evolution of the computer interface. Advancements in the areas of input devices, (73) processing and vitual reality could lead to fundamental changes in the way human and computer interact. The technological battlefield of the future will be adding layers between the user and the raw machine to make the (74) as invisible as possible. (75) crepresents the next evolutionary step for the interface.

A．DBMS

B．application software

C．operating systems

D．GUI
查看答案
多项选择题

瓦斯抽放按抽出来源分类，抽放方法有（）

A、本煤层瓦斯抽放

B、邻近层瓦斯抽放

C、采空区瓦斯抽放瓦斯

D、远煤层瓦斯抽放
查看答案