来自于现场的DC4-20mA电流信号、热电偶信号、热电阻信号等都是()信号。 ["模拟","数字","离散量","开关"]
《难经•五十八难》中提到的外感热病有:(). ["风温","湿温","暑温","中风","春温"]
喷射混凝土时碎石粒径不大于()。 ["20mm","30mm","40mm"]
属于伏气温病的是:(). ["风温、春温","秋燥、大头瘟","春温、伏暑","湿温、伏暑"]
螺钉、螺柱联接中,螺杆不许顶到()。 ["A、孔端","B、孔壁","C、孔底","D、孔缘"]
()的含量随着矿化度增长不断增加,()的含量常可以说明地下水的矿化程度。