【简答题】高低压电器进行选择的项目一般有: 、 、 ,进行校验的项目为 、
【简答题】设T为有界线性算子,且‖T‖≤1,证明 {x:Tx=x}={x:T * x=x}
【单选题】He always go to school by ()bus.
【简答题】设X为赋范空间,z∈X,f∈X'。求证:若T:X→X定义为 T(x)=f(x)z, x∈X。 则T为紧线性算子。
【单选题】He is very ____________. He always go to work on time.
【简答题】--How he ( go ) to work? --He always ( go ) to work by car.
【简答题】设{X(t),t∈[0,+∞)}为正态过程,令Y(t)=X(t+1)-X(t),试证:{Y(t),t∈[0,+∞)}为正态过程。