【简答题】求下列函数的定义域: (1)y= - ; (2)y=
【简答题】按误差出现的规律分类,测量误差可分为哪几种?它们各有什么特点 ?
【简答题】在下面一段文字横线处补写恰当的语句,使整段文字语意完整连贯,内容贴切,逻辑严密。每处不超过 15个字。 2016年年初,引力波被科学家证实,在很多人尚未明白它究竟是何物之际,已有商家“抢占先机”,1____________________________________。在某电商网站,一款声称能够防引力波辐射的毯子售价近200元。2________________________________?...
【单选题】放大电路如图所示,已知三极管的 β = 50 ,则该电路中三极管的工作状态为( )。
【单选题】Several years ago during the dot-com passion, Manhattan lawyer John Kennedy sometimes wore a dark blue suit to meet potential Internet clients. But he soon realized that his conservative clothes were ...
A.
the Manhattan law business grew very quickly
B.
shaking hands with clients became popular
C.
the country was fighting the conservatives
D.
the Internet companies boomed then
【单选题】一位 45 岁女性,一侧乳房皮肤局部呈橘皮样,乳头内陷,可能为