A.35% | B.50% | C.76.7% | D.82.14% |
74.5 |
143.5 |
x |
430.5g |
| ||
245 |
96 |
y |
96g |
245g |
319.5g |
A.7.41 | B.3.59 | C.3.21 | D.2.46 |
A.23:24:56:27 | B.1:2:2:3 |
C.2:3:3:6 | D.2:1:1:2/3 |
A.M为Mg,N为Cu | B.M为Fe,N为Al |
C.M为Al,N为Mg | D.M为Cu,N为Mg |
A.x=
| B.
| ||||||||
C.
| D.
|
A.14:3:7 | B.28:2:17 | C.1:3:2 | D.7:1.5:8.5 |
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