【简答题】已知向量 , 是齐次线性方程组 的一个基础 解系,则 。
【简答题】某患者24小时尿量为3000ml,尿比重为1.035,诊断应考虑为( )
【简答题】Delphi的一个项目由若干文件组成,其中文件名后缀含有“~”的文件为()
【简答题】设C盘根目录下有一文件名为“a1.txt”,若该文件还没有打开,现在要知道它的长度,可使用命令【 】。
【简答题】设η1,η2,……ηt是齐次线性方程组(1)的一个基础解系,则与η1,η2,……ηt等价的线性无关的向量组也是方程组(1)的基础解系.
【单选题】听力原文:W:Henry has been acting strange lately M:I notice that too.It is unusual of him to work diligently because be used to hate homework so much. Q:What can be inferred about Henry? (13)
A.
Henry usually works diligently.
B.
Henry has become a much better student.
C.
Henry has changed her study habits lately.
D.
Henry doesn't like homework any more.
【单选题】宴会安排日记薄填写中,对于已经确定的预订需用()
【单选题】More work doesn't necessarily _____more men.