化简关于x的代数式（2x2+x）-[kx2-（x2-x+1）]．当k为何值时，代 发布时间：2017-05-21 16:56 │ 来源：www.tikuol.com 题型：解答题 问题： 化简关于x的代数式（2x2+x）-[kx2-（x2-x+1）]．当k为何值时，代数式的值是常数．
题型：解答题 从方框中选择适当的选项补全对话，使对话完整通顺。A. Are there any computers in your classroom? B. It's behind Tony's. C. There isn't a television in my classroom. D. How many students are there in your class? E. It's on the teacher's desk. F. Yes, there are. G. No, there aren't. A: (1) ______ B: There are forty-eight, that's twenty-four boys and twenty-four girls. A: (2) ______ B: Yes, there is only one. (3) ______ A: Are there any pictures on the walls of your classroom? B: (4) ______ There are four pictures. A: Where is your desk? B: (5) ______ 1.____ 2.____ 3.____ 4.____ 5.____ 查看答案
题型：解答题 以下属于MCS-51对定时器工作的初始化步骤的是（）。A.设置TCON，以确定工作方式；B.装载定时器初值；C.设置中断，并开相应的中断；D.给TMOD送命令字，以便启动或禁止定时器的运行。 查看答案