分离FeCl3、KCl、BaSO4的固体混合物,应采用的一组试剂是[ ]
A.水、硝酸银、稀硝酸
B.水、氢氧化钠、盐酸
C.水、氢氧化钾、盐酸
D.水、氢氧化钾、硫酸
答案:C
Although the necklace is not made of real crystal, the shape and its size still most young people to buy it.
A.appeal to
B.fit for
C.go with
D.apply for
(2011年湖北宜昌,12题)交警用装有重铬酸钾(K2Cr2O7)的检测仪检测司机是否酒后驾车。K2Cr2O2中Cr的化合价为
A.+6
B.+3
C.+5
D.+1