Hg、As、Pb等急性中毒会引起牙龈出血、牙齿松动、恶心、呕吐、腹痛、腹泻等症状。
参考答案：对
善清心火的药物有（）、栀子、木通、朱砂等。
I _____ he _____ tomorrow. [ ]
A. don't think; will come
B. think; won't come
C. not think; will come
D. think, don't come
