A:who I had a talk
B:whom I had a talk with
C:whom I had a talk
D:which I had a talk with
m,n都是正整数,多项式xm+yn+3m+n的次数是( ).
第一次世界大战前,法国的克里孟梭疾呼:“我第一是复仇,第二是复仇,第三仍是复仇”。他的“仇恨”起因于