关于加热炉的余热回收的描述正确的是()。
A.对流段增加管束
B.对流段采用强化对流传热的扩面管
C.使用空气预热器
D.提高排烟温度
参考答案:A, B, C
可损害第Ⅷ对颅神经()
A.SM
B.INH
C.PZA
D.EMB
E.PAS
The names of the currencies of U. S. A. U. K and Germany are called ______ respectively.
A.US Dollar, Pound Sterling and Deutsche Mark
B.US Dollar, Deutsche Mark and Pound Sterling
C.US Dollar, Guilder and Deutsche Mark
D.US Yuen, Pound Sterling and Deutsche Mark