矿用防爆柴油机车排气口的排气温度不得超过()°C。 ["50","60","70"]
提出自我论的心理学家是() ["班杜拉","罗杰斯","马斯洛","弗洛伊德"]
宝马公司于哪年成立() ["1910","1912","1916"]
申请进口种畜禽的,应当持有种畜禽生产经营许可证。进口种畜禽的批准文件有效期为() ["一年","六个月","三个月","二个月"]
恒电位仪的极化电源输出一端接()必须可靠连接。 ["管道通电点","辅助阳极","参比电极","独立大地"]
简述焦炉用焦炉煤气加热时气体流动的途径?