关于组件活门,下面说法哪个不正确().
A.为电动气控活门
B.带有三个线圈用于控制流量
C.带有位置电门控制涡轮风扇的工作
D.为马达驱动活门
参考答案:D
氢气是一种高能清洁燃料。请计算:20g氢气完全燃烧,生成多少克水?
Jessica()her father on the knee and asked him not to worry about his health.
A.patted
B.struck
C.stroked
D.paced