题干
—Are you pleased with the result of the exam?
— Not at all, I can't have _______.
A：a worse one
B：a better one
C：the worse one
D：the best one
答案(点此获取答案解析）
A
溶液至过量，同时加热，沉淀的物质的量先增多后减少，但最终仍有沉淀未溶解，在此过程中还有刺激性气味气体生成。