【单选题】下面哪个说法有错误。
B.
色彩的敏感性是人类对付迟钝与冷漠的有利武器。
【判断题】对于大于180°的圆弧应该标注其直径尺寸φ,对于小于或等于180°的圆弧应该标注其半径尺寸R。
【简答题】一周期性数字波形如下图所示,试计算:(1)周期;(2)频率;(3)占空比。
【简答题】一周期性数字波形如图所示,试计算:(1)周期;(2)频率;(3)占空比。
【单选题】下面哪个说法是错误?
A.
Unity桌面是Ubuntu操作系统的桌面系统。
B.
Gnome桌面是Ubuntu操作系统的桌面系统。
C.
Ubuntu操作系统没有桌面系统,只能用命令操作。
【单选题】Please note that Item no.789 can be certainly promised for immediate shipment ____ receipt of your order.
【简答题】听力原文:Attention, please. Due to expansion project, please note the following changes. All domestic departures will board in the main terminal building, at gates A and B. All domestic ar will depl...
【单选题】Please give the note (条子) _____ your teacher. [ ]
【单选题】搜索引擎查询有多种使用方法,下面哪个说法错误的?