Everything_______into consideration,they ought to have another chance. A.taking B.is taken C.to take D.taken 答案:D
用一种试剂鉴别NaCl、MgCl2、AlCl3、FeCl2、CuSO4,这种试剂是________.鉴别的现象和反应的离子方程式为:
NaCl________,
MgCl2________,
AlCl3________,
FeCl2________,
CuSO4________.