A.78.5% | B.21.5% | C.a2 | D.0.785a2 |
A.0.76平方分米 | B.0.84平方分米 | C.0.86平方分米 |
A.50. 25 | B.28. 26 | C.25. 12 | D.14. 13 |
A.4:π, | B.1:1 | C.157:2 |
A.a2∶πa2 | B.a2∶πa2 | C.a2∶πa2 | D.a2∶πa2 |
A.长方形 | B.正方形 | C.圆 |
A.4 | B.2 | C.16 | D.20 |
A.113.04 | B.36 | C.28.26 | D.18.84 |
A.2:3 | B.4:6 | C.3:2 | D.4:9 |
A.无法解答 | B.62.8 | C.12.56 | D.15.7 |