题目

That accident totally _________ our arrangement and caused a lot of problems, which we found difficult to _________. A . defeated; get on B . turned over; get on C . saddened; get over D . upset; get over 答案：D使27gCuCl2样品在溶液中与足量的AgNO3溶液反应，得到58gAgCl．则样品中混有的盐可能是（ ）A．NaClB．KClC．BaCl2D．Cu（NO3）2