单项选择题
A.20B.15C.18D.12
A.103B.203C.150D.98
A.43B.38C.32D.28
A.240B.270C.320D.360
A.196B.204C.216D.224
A.182B.812C.128D.218
A.1088B.1120C.1152D.1184
A.6B.4C.8D.2
A.776B.582C.388D.194
A.435人B.425人C.535人D.615人
A.360369B.388089C.393706D.482040