题目内容
(请给出正确答案)
[单选题]
楼梯的坡度()较为合适。
A.45°
B.35°
C.30°
D.25°
答案
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A.45°
B.35°
C.30°
D.25°
第8题
A.20%~25%:25%~30%:50%~60%
B.10%~15%:20%~35%:50%~60%
C.10%~25%:25%~30%:50%~60%
D.10%~25%:25%~30%:50%~60%
E.15%~25%:30%~45%:45%~60%