A.2點(diǎn) B.4點(diǎn) C.5點(diǎn) D.6點(diǎn)
A.0.01-0.02 B.0.2-0.5 C.0.1-0.4 D.0.02-0.05
A.1/3 B.1/4 C.1/2 D.2/3