弯曲正应力沿梁截面高度()
A.均匀分布
B.按直线规律分布
C.按抛物线规律分布
参考答案:B
It rained heavily this morning, but _______ of my classmates were away from school.
A.neither
B.none
C.all
D.both
( )由企业管理费和财务费用组成。
A.企业成本
B.间接费
C.直接费
D.直接工程费