用跳汰机选锡矿,给矿量10吨,品位1.2,精矿量6吨,品位2.4,试求富集比(i)是多少?
参考答案:
i=2.4/1.2=2
单词拼写(10×0.5=5分)
小题1:A r ______ person is a king, queen, or emperor, or a member of their family.
小题1:
小题2:F_______ the letter and put it in an envelope.
小题2:
小题3:A marriage has been a_________ between Mr Brown and Miss White.
小题3:
小题4:She studied __________(建筑学) and art history at the university.
小题4:
小题5:He shouted after them, vainly trying to _______(吸引) their attention.
小题5:
小题6:It is hard for me to ______(放弃) religious beliefs.
小题6:
小题7:His speech won round after round of _______(热情) applause.
小题7:
小题8:His past experience qualified him to h________ such a matter.
小题8:
小题9:I'm afraid I have some pressing business to _________(处理) to.
小题9:
小题10:They intended to c_________ the legality of his claim in the courts.
小题10:
下列关于水喷雾灭火系统维护管理的说法,正确的是()。
A.消防水池、消防水箱应每月检查一次
B.每个季度应对系统所有的试水阀和报警阀旁的放水试验阀进行一次放水试验
C.每半年应对水源的供水能力进行一次测定,应保证消防用水不作他用
D.系统上所有的控制阀门均应采用铅封或锁链固定在开启或规定的状态
E.寒冷季节,消防储水设备的任何部位均不得结冰。每天应检查设置储水设备的房间,保持室温不低于5℃