发动机涂装系指发动机总成(包括变速箱、离合器)的涂装工艺。( )
参考答案：对
---____ is our new headmaster?
---The man standing by the window, smoking a cigarette.
A．Where
B．How
C．Which
D．What
熟料在煅烧中由于慢冷造成C3S分解出f-CaO。
