题目

Look! Sonia looks worried. There must be ________ wrong with her.A. nothing B. something C. anything D. everything 答案：【答案】B【解析】试题句意：看！索尼亚看上去很焦急。她一定是出了什么问题。A. nothing没有东西；B. something某事；C. anything任何事；D. everything每一件事， there is something wrong with sb固定句型，故选择B。醋酸钡晶体[(CH3COO)2Ba·H2O]是一种媒染剂，易溶于水。下列有关0.1 mol/L醋酸钡溶液中粒子浓度关系的表示中，错误的是 [     ]A.c(Ba2+)>c(CH3COO-)>c(OH-)>c(H+) B.c(H+)+2c(Ba2+)=c(CH3COO-)+c(OH-) C.c(H+)=c(OH-)-c(CH3COOH) D.2c(Ba2+)=c(CH3COO-)+c(CH3COOH))