城市污水的设计水质,在无资料时,生活污水的5日生化需氧量应按每人每日()g计算.
A.20~35
B.5~15
C.35~50
D.35~40
参考答案:A
---What does your pen pal ?
---She is short and has long hair.
A.look like
B.come from
C.look at
D.is from
利用中国九分法对烧烫伤面积进行估算,成人头颈的面积为体表的()
A.1%
B.2%
C.5%
D.7%
E.9%