A:cost
B:price
C:reward
D:deal
37×6=____
37×12=____
37×18=____
9×37=____
15×37=____
21×37=____
Mike is my friend. He is from ____.
在有理数的原有运算法则中我们补充定义新运算“⊕”如下:当a≥b时,a⊕b=b2;当a<b时,a⊕b=a.则当x=2时,(1⊕x)·x-(3⊕x)的值为( )(“·”和“-”仍为有理数运算中的乘号和减号)