A:CH≡CH+H2O →△H2SO4 CH3CHO
B:C2H5Br+H2O →△NaOH C2H5OH+HBr
C:CaC2+2H2O→Ca(OH)2+C2H2↑
D:CH3COOCH3+H2O →△催化剂 CH3COOH+CH3OH
“三国同盟”与“三国协约”两大军事集团的核心分别是 ( )