若方程3x2m+1-2yn-1=7是二元一次方程,则m、n的值分别为( )
A.m=1,n=1
B.m=1,n=2
C.m=0,n=1
D.m=0,n=2
答案:D
Every year more than 500 students are ______ into universities for further study. [ ]
A. admitted
B. persuaded
C. advised
D. attended
在火车车厢内用餐时,最好不要吃有怪异气味的食物。