构成事故三要素是()
A、人、钱、物
B、人、物、设备
C、人、物、环境
参考答案:C
This woman likes finding fault ________ others ________ the spot. [ ]
A. with;on
B. with;in
C. in;on
D. in;in
引风式风机有哪些优缺点?