A.初餾點(diǎn)和終餾點(diǎn)均偏高 B.初餾點(diǎn)和終餾點(diǎn)均偏低 C.初餾點(diǎn)偏高終餾點(diǎn)偏低
A.2--3 B.4--5 C.6--7 D.7--8
A.汽油 B.煤油 C.輕柴油