A . A．“O”≥1:80及“H”1:160
B . B．“O”≥1:32及“H”≥1:80
C . C．“O”≥1:160及“H”≥1:120
D . D．“O”≥1:60及“H”≥1:120
E . E．“O”≥1:64及“H”≥1:32