In         , when he was in       , he went to California to seek his fortune.

A．the 1980s; his twenties

B．the 1980s; the twenties

C．the 1980s; twenties

D．1980s; the twenties

油箱通气的目的之一是：（）.

A.排出燃油蒸气。

B.限制燃油箱内外压力差。

C.消除油泵气塞。

D.减小油箱内部压力。