单项选择题
A.6,19B.8,18C.10,20D.16,22
A.1271B.1237C.3910D.13259
A.1575B.1144C.1186D.1921
A.17,81B.16,54C.15,36D.14,42
A.121B.169C.289D.361
A.-2B.0C.1D.5
A.30.16B.39.72C.36.32D.31.32
A.40B.36C.60D.46
A.164B.168C.225D.169
A.441B.225C.121D.676
A.226B.1292C.7772D.496