环境标准按发布权限可分为( )。
A．强制性标准
B．国家环境标准
C．推荐性标准
D．地方环境标准
E．行业环境标准
参考答案：B,D,E
--- Where is your great-grandmother __________ your mother’s side from?
--- She is from Beijing．
A．by
B．on
C．at
D．of
Both teams were in hard training, _______ was willing to lose the game.
A．either
B．neither
C．another
D．the other
