题干
He was so sad because she failed in the maths test. Let’s ______ her _______.
A：leave … behind
B：leave … alone
C：leave … aside
D：leave … out
答案(点此获取答案解析）
B
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。