能够扩大燃烧带的因素是（）。
A、提高顶压
B、喷吹煤粉
C、降低风温
D、提高风温
参考答案：B
—Come and join us, Jimmy!
---I’m sorry, but I’m really busy now. If I ________ time, I would certainly go.
A．will have
B．have had
C．had
D．have
汽车型号CAl141中，第一个1所代表的含义为（）
A.客车
B.轿车
C.载货汽车
D.越野汽车
