A:KNO3(NaCl):蒸发结晶
B:CO(CO2):点燃
C:FeSO4溶液(CuSO4溶液):过量的铁,过滤
D:CaCO3(CaCl2):溶解,过滤,蒸发结晶
所有血管中,血流速度最快的是( )
图为染色体、DNA和基因关系示意图,下列叙述正确的是( )
( ____ )2=x2y2;(____ )3=-8b3a3
_____ what many people thought, the graduate came here not to _______ fame or money but the true value of life.