— They're 15 yuan.
A:How many is
B:How many are
C:How much is
D:How much are
求经过直线l1:3x+2y﹣1=0和l2:5x+2y+1=0的交点,且垂直于直线l3:3x﹣5y+6=0的直线l的方程.
从方框中选择适当的短语,并用其正确形式填空。
either…or even though more and more between……and at least
一个四位数,347□,要使它能被2整除,□里可能是____