單項(xiàng)選擇題
A.200B.300C.400D.500
A.3.6B.3.7C.3.8D.3.9
A.5B.10C.15D.20
A.65B.75C.85D.98
A.0.4B.0.5C.0.6D.0.7
A.4B.8C.10D.12
A.0.1B.0.2C.0.3D.0.4
A.20B.25C.30D.35
A.2B.4C.8D.10
A.50B.100C.200D.500
A.10B.15C.20D.25