负荷不变时,水冷壁受热面无论是积灰、结渣或结垢,都会使炉膛出口烟温()
A、不变
B、增加
C、减小
D、不一定
参考答案:B
Look! She is coming here and there _____. [ ]
A. goes the bus
B. going the bus
C. the bus goes
D. the bus going
“成交方式”栏应填( )。