____%=4÷5= 24÷____=____:10.
Good reading materials are good ____ (friend).
已知25℃、101kPa下,如图所示,石墨的燃烧热为393.5kJ/
mol,金刚石的燃烧热为395.0kJ/mol.下列说法或表达正确的是
( )