The bag _________ on the table is brought in the shop _________ in the east of the city.
A:laid; lying
B:lying; laid
C:lies; lay
D:laying; lain
如图,在Rt△ABC中,∠C=90°,∠B=30°,将△ABC绕着点C逆时针旋转后得到的△A′B′C的斜边A′B′经过点A,那么∠ACA'的度数是____ 度.