单项选择题
A.不均匀系数小于等于5 B.不均匀系数小于等于6 C.不均匀系数大于5 D.不均匀系数大于6
A.75kPa B.105kPa C.150kPa D.175kPa
A.0.18 B.0.26 C.0.34 D.0.55