【简答题】Even in the chaos of 1918, people who knew ______ and ______ did their duty, often in heroic fashion.
【单选题】已知甲基红溴甲酚绿指示剂的变色点是pH=5.1,酸式色为酒红色,碱式色为绿色。分别向0.01mol/L的盐酸溶液、0.01mol/L的氢氧化钠溶液、0.01mol/L的醋酸钠溶液中滴加2~3滴该指示剂,显示的颜色分别是
【判断题】通货紧缩是指社会一般物价水平持续下降长达3个季度以上。
【单选题】— Who will be _____ duty tomorrow? — Susan will. [ ]
【单选题】The highway policeman on duty ______ the driver who was speeding and asked to see his license.
【简答题】——Who is on duty today? ——
【单选题】Who was on duty yesterday? __
【单选题】'Who is _____ duty today?' 'I am.' [ ]
【单选题】Who is on duty today? On duty 的反义词是:
【单选题】中国共产党党员是中国工人阶级的有( )觉悟的先锋战士。