(四)用简便的化学方法鉴别下列各组化合物:-|||-(1)(A)-|||-(B)-|||-(C)-|||-(2)、A) (({C)_(2)(H)_(5))}_(2)C=CHC(H)_(3)-|||-(B) (H)_(3)((C{H)_(2))}_(4)Cequiv CH-|||-CH3-|||-(C)