A.1/3~1/5 B.1/3~1/5 C.1/3~1/6 D.1/2~1/3
A.30% B.60% C.80% D.90%
A.轉(zhuǎn)過180° B.轉(zhuǎn)過90° B.處于原來位置 D.轉(zhuǎn)過45°