补涂的涂布形式有：刷涂、滚涂、有气喷涂、无气喷涂、粉末喷涂。
参考答案：对
一扇形面积是3π，半径为3，则该扇形圆心角度数是[ ]
A.120°
B.90°
C.60°
D.150°
Bill said they would have ___________ holiday.
A. a eight-day B. an eight-day C. an eight-days
