煤矿矿井主要通风机必须装有（），必须能在（）内改变巷道中的风流方向。
参考答案：反风设施；10min
_____ was known to all, William had broken his promise _____ he would give us a rise. [ ]
A. As; which
B. As; that
C. It; that
D. It ; which
男性，30岁，突然昏迷，瞳孔缩小，肌束震颤，大汗，双肺水泡音，血、尿常规正常，可考虑为
A．肝昏迷B．一氧化碳中毒昏迷C．中暑D．有机磷农药中毒E．肺性脑病
