网址:http://m.1010jiajiao.com/timu3_id_38906[举报]
A.11∶1 B.9∶1 C.1∶11 D.1∶9
A.11∶1? B.9∶1? C.1∶11? D.1∶9
A.11∶1 B.9∶1 C.1∶1 D.1∶9