倒凹坡度应大于A.15° B.25° C.10° D.5° E.20°

题库2022-08-02  14

问题 倒凹坡度应大于A.15°B.25°C.10°D.5°E.20°

选项 A.15°
B.25°
C.10°
D.5°
E.20°

答案 E

解析
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