A.32% | B.45.4% | C.55% | D.无法确定 |
A.2% | B.9.3% | C.0.93% | D.0.8% |
A.NH4Cl,NH4NO3,CO(NH2)2 | B.NH4NO3,NH4Cl,CO(NH2)2 |
C.CO(NH2)2,NH4NO3,NH4Cl | D.NH4NO3,CO(NH2)2,NH4Cl |
A.1:2 | B.2:1 | C.11:14 | D.14:11 |
A.1:1 | B.1:2 | C.7:11 | D.11:7 |
A.3:5 | B.3:2 | C.4:5 | D.6:5 |
© 2017-2019 超级试练试题库,All Rights Reserved.