锚杆拉拔力试验时同组单根锚杆的锚固力或拉拔力,不得低于:() ["设计值","设计值的80%","设计值的90%","设计值的70%"]
印刷设备不包括() ["印刷的制版","印刷过程","印后加工","印后运输"]
按照印版的特点油墨可以分为()、()、()网孔板印刷油墨,以及其他的专用油墨。
在存有易爆炸、易燃物的舱内及在燃料油舱、煤舱内,应采用() ["一般形式的行灯","防爆灯具","日光灯","白炽灯"]
How can we describe the main proficiency goal of the teaching and learning of pronunciation?