把8颗☆每2颗分成l份，可以分8÷4=2（份）。[ ]
错误
二次函数y=-2x2+2x-1的图象的开口______，当x______时．y随x的增大而减小．
The film is really wonderful.It's such a long time ________ I enjoyed myself so much.[ ]
A. when
B. before
C. as
D. since
