我国增值税的征收率是（）
A.13%
B.3%
C.17%
D.0%
参考答案：B
He ____ much food ____ the poor family.
A．provided to
B．provides with
C．provided with
D．provides for
受弯构件的斜截面破坏形态有哪几种？分别如何防止其发生？
