把一块圆柱形木头削成一个圆锥,削去部分与圆锥体积的比是2:1。 [ ]
错误
—If a good program on TV,could I watch it,Mom?
—Sure,but you must finish your homework first[ ]
A.there is
B.there is going to be
C.there was
D.there have
贯标体系九字方针是指().