一 What if someone calls you when you are out?
一 Well. If anyone calls, tell him I'll come back soon.
A:in a short time
B:finally
C:suddenly
若|m﹣4|与n2﹣8n+16互为相反数,把多项式a2+4b2﹣mab﹣n因式分解.
①PbO+C △_ Pb+CO (主要)
②PbO+CO △_ Pb+CO2
③〔Cu (NH3)2〕Ac+CO+NH3 △_ 〔Cu (NH3)3〕Ac•CO;△H<0(Ac﹣代表醋酸根离子此反应无明显现象)
试根据图回答问题:
观察下列漫画并回答问题
结合漫画,回答问题
一Does our new English teacher have a round or long face?
一 .