---- Really, I don’t know ______ to join the army or to find a job after my graduation. ---- Why don’t you ______ your parents’ advice? They will surely help you. A.if; take B.whether; follow C.if; give D.whether; seek 答案:D直线L1:2x+(m+1)y+4=0与直线L2:mx+3y-2=0的平行,则m的值为
( )
A.2
B.-3
C.2或-3
D.-2或-3