A.6,08.B.6,18.C.6,42.D.6,36.
A.0,029.B.0,028.C.0,026.D.0,027.
A.17,7 gam.B.18,8 gam.C.21,9 gam.D.19,8 gam.
A.1,05.B.0,85.C.0,48.D.0,41.
A.57,2.B.42,6.C.53,2.D.52,6.
A.Na.B.Li.C.Cs.D.K.
A.5,54.B.5,42.C.5,59.D.16,61.
A.B.C.D.
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