在《标准》中规定，大巷采用电机车运煤的年产120万t以上的矿井，应采用（）。
A、监控系统
B、集控系统
C、自动信号系统
参考答案：B
Tomorrow would be Christmas Day, and she had only $1.87 .
A．with which to buy a present to Jim
B．by which to buy Jim a present
C．with which she could buy a present for Jim
D．in which to buy Jim a present
检验结果的原始记录记录流程不包括（）
A．检验人员相互校核
B.化验室负责人审核签字
C．填写报告单
D.定期抽查原始记录
