【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】It is good _____ people _____ lots of vegetables. [ ]
【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
【单选题】The highway policeman on duty ______ the driver who was speeding and asked to see his license.
【单选题】Who is on duty today? On duty 的反义词是:
【单选题】People in the North ______.
A.
often eat supper in the evening
B.
often eat lunch at the canteen
C.
often eat in late afternoon