汛前尾矿库制定防汛方案的原则说法不正确的是（）。
A、蓄洪为主，排洪为辅
B、排洪为主，蓄洪为辅
C、只考虑排洪
D、不考虑蓄洪
参考答案：B, C, D
A proposal has ________ that a new law should be made to fight drugs abuse.[ ]
A. put back
B. been put off
C. put up
D. been put forward
形成感染性结石的易感因素是
A．高钙尿症B．高草酸尿症C．产生脲酶的细菌D．甲状旁腺功能亢进E．肾小管性酸中毒
