A:5.6V 1.4V
B:7.5V 1.5V
C:1.5V 7.5V
D:1.4V 5.6V
如图,在平面直角坐标系中,抛物线y=x2+mx+n经过点A(3,0)、B(0,﹣3),点P是直线AB上的动点,过点P作x轴的垂线交抛物线于点M,设点P的横坐标为t.
下列说法不正确的是( ).
—You went out and enjoyed yourself when you________.
—I'm sorry,Mum. I'll finish my homework tonight.