單項選擇題
A.0.67~0.75 B.0.80~090 C.0.60 D.0.50
A.0.2、0.6、0.8 B.0.2、0.4、0.6 C.0.4、0.5、0.6 D.0.4、0.6、0.8
A.0.2和0.6 B.0.2和0.8 C.0.4和0.6 D.0.3和0.7