汽油机燃烧过程中火焰中心在()期形成。
A、着火延迟期
B、急燃期
C、补燃期
D、后燃期
参考答案:A
―My chance will come soon.
― .
A.Every dog has its day.
B.A good medicine tastes bitter
C.A good name is easier lost than won
D.Blind men can judge no colors
独立避雷针制作执行()项目。
A.一般金属构件
B.轻型金属构件
C.重型金属构件
D.钢结构构件