∵m是方程x2-2x-23=0的一个根，
∴m2-2m-23=0，
解得m2-2m=23．
故答案是：23．
The English language____ the rules and____ each group of people brought to Britain with them.
A．consists of; vocabulary
B．consists in; vocabulary
C．consists of; vocabularies
D．consists in; vocabularies
脉沉细而软者，称为（）
A.结脉
B.促脉
C.代脉
D.微脉
E.弱脉
