A:(1,+)
B:(-,]
C:(,+)
D:(-,]
选一选。
捧 蝴 绿 厚 闹
①左右结构:____
②半包围结构:____
某样品由氧化铜和铜.取10.0g该样品于烧杯中,向其中加入192.0某浓度的稀硫酸,恰好完全反应,最终所得溶液质量为200.0g.(已知:CuO+H2SO4=CuSO4+H2O)
Chen Yunlin said that the two sides across the Taiwan Straits would overcome the difficulties________they joined hands to find solutions and help each other.
4,8,____,16,____