设备故障信息的获取方法包括()法、()法、磨损残渣测定法及设备性能指标的测定。
参考答案:直接观测; 参数测定
Though the situation is rather serious, financial leaders are still ______ about global economy.
A. positiveB. negativeC. activeD. passive
采用小组教学法时,若出现争执的场面,教师应该______
A.肯定正确的观点 B.协调意见C.反对争论 D.强调不一致是正常的现象