检查埋地燃气管道泄漏的错误方法是：（）
A.钻孔查漏检查
B.挖深坑检查
C.地缝、地沟、地孔查漏检查站
D.明火查漏
参考答案：D
Mr. Li has ordered ___ for the school lab.
A．three equipments
B．three pieces of equipments
C．three pieces of equipment
D．three pieces equipment
接班前对运转机泵检查的内容？
