| ||
A.
| B.
| ||||
C.
| D.
|
| ||
2×84 |
x |
62 |
(w1g-w2g) |
84(w1-w2) |
31 |
w1-x |
w1 |
84w2-53w1 |
31w1 |
A.
| B.
| C.
| D.
|
A.a=b | B.3a=b | C.a=2b | D.2a=b |
A.M+N=P+Q | B.M+2N=2P+Q | C.2M+N-2P+Q | D.2M+N=P+2Q |
A.4.3g锌 | B.4.8镁 | C.2.3g钠 | D.5.4g铝 |
A.a>b>c | B.a=b=c | C.c>b>a | D.b>c>a |
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