下列属于肿瘤二级预防措施的是()
A．戒烟、戒洒
B．控制大气污染
C．防止日光曝晒
D．定期普查
E．不食烟熏食品以及质变食物
参考答案：D
-How do the shops make money if they sell at such low prices?
-Manufacturers, it seems, are willing to bring down prices ________ big volume purchases.[ ]
A. under the name of
B. on behalf of
C. in return for
D. in preparation for
焦比是指（）消耗的综合焦炭的千克数。
A、每吨生铁
B、每千克生铁
C、每吨炉渣
