催化装置的非净化风主要用做（）。
A、输送风和反吹风
B、输送风和动力风
C、反吹风和仪表风
D、仪表风和动力风
参考答案：A
The governor declared that the treasure belongs to _______ found it first, _______ many people hunting for it day and night.
A．whoever; to make
B．whoever; making
C．no matter who; to make
D．whomever; making
测量二次回路的绝缘电阻应使用（）。
A.500V摇表
B.1000V摇表
C.2500V摇表
D.5000V摇表
