单项选择题
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
A.490B.491C.276D.288
A.30,31B.39,40C.15,16D.17,18
A.62B.57C.42D.38
A.56B.54C.35D.40
A.4B.3C.16/3D.5