【判断题】生活中我们要远离不适宜未成年人出入的地方,比如酒吧、网吧、歌厅等。
【简答题】The girls played their instruments. Them performing for us was a nice surprise.
【单选题】用算筹表示一个十位数,其表达方法是( )。
【简答题】The girls played their instruments. Them performing for us was a nice surprise. ____
【简答题】The girls played their instruments. Them performing for us was a nice surprise.
【单选题】一个LTI系统,其输入f(k)=akε(k),单位脉冲响应h(k)=ε(k),则f(k)*h(k)的结果为______。