A:用装置甲进行中和热的测定
B:用装置乙制取CO2气体
C:用装置丙蒸发CH3COONa溶液得CH3COONa晶体
D:用装置丁模拟工业制氨气并检验产物
I often help mother__________ housework after school.
— Why does Yun Tianming look so tired out these days?
— He pracitses basketball every day so that he could ____ for the Slam Dunk Contest.
关于核能的下列说法中,正确的是( )
已知锐角△ABC中,边BC长为12,高AD长为8.