如果抛物线y=(2-a)x2的开口方向向下,那么a的取值范围是______.
因为抛物线y=(2-a)x2的开口向下,
所以2-a<0,即a>2,
故答案为a>2.
His best-known work that is ___________ all praise can be seen in the museum.
A.with
B.beyond
C.without
D.Within
每一年度结束后30日内,期货交易所应向中国证监会提交其财务会计报表。( )