单项选择题
A.10.110.16.1和10.110.25.1 B.10.76.136.21和10.76.142.1 C.10.52.55.34和10.52.62.2 D.10.33.23.2和10.33.31.1
A.10.5 B.13.8 C.17.1 D.20.4
A.850 B.1310 C.1490 D.1550