一次风、（）配比失调易造成循环流化床锅炉床温过高或过低。
A、引风
B、二次风
C、根部风
D、返料风
参考答案：B
长途客运车辆(50座，柴油发动机)安装的防抱死制动系统(ABS)
According to the newly released documents, this idea of rectification will be made known to all fields of the superstructure.
A. spheres B. spears C. communities D. branches
