一氧化碳传感器的报警值为（），温度传感器的报警值为30℃
A、0.0024％CO
B、0.0050%CO
C、0.0020%CO
参考答案：A
执行异议
In the deserted factory several huge machines were left to rust and decay.
A. inaugurate B. disintegrate C. accelerate D. disseminate
