排气门早开晚关是为了减少气缸内的残余废气量和排气过程消耗的功，减少残余废气量，相应的也会增加进气量。
参考答案：对
Seeing a stranger with a knife in his hand, the little girl stood under the tree, _______ out of her mind.
A．frightened
B．be frightened
C．to be frightened
D．frightening
目前比较流行的报表有4种，它们是纵栏式报表、表格式报表 【9】 和标签报表。
