科目: 来源: 题型:
| A.a="3," b="4," c="6" | B.a="1," b= |
| C.a="5," b="6," c="8" | D.a= |
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科目: 来源: 题型:
| A.(4a+4)米2 | B.(a2+4)米2 | C.(2a+4)米2 | D.4米2 |
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