【判断题】目前国内改革和发展中会衍生出“政治文化厌忘情结”。( )
【多选题】配位滴定中,在什么情况下不能采用直接滴定方式?
A.
待测离子与EDTA配位反应速率较慢,或能封闭指示剂,如Al3+、Cr3+等
B.
滴定反应缺乏变色敏锐的指示剂,如Ba2+、Sr2+等的滴定
C.
待测离子与EDTA不能形成配合物或形成的配合物不稳定,如碱金属
【单选题】10 The British Prime Minister who led the British to defeat Nazi Germany is_
【简答题】完形填空。 There are times in our lives when we remember. Remembering the good things of __ 1__ is a most precious (宝贵的) time; these memories are __ 2__ in the corner of my mind. When I was four years old,...