张之洞“中体西用”思想的内容。

关于x的一元二次方程x²-2x+m=0 有两个实数根，则m的取值范围是（      ）。

After a day’s hard work, Mary went to the nearby shop to _____ herself to a strawberry ice cream.

A．satisfy

B．treat

C．provide

D．offer

My brother is _______ homework. He often ______ homework at homework.

A．does, doing

B．doing, do

C．do, doing

D．doing, does

脚标的E，如LaE，有什么特殊意义？

位于CPU和主存DRAM之间、容量较小但速度很快的存储器称为 【10】 。