矩形截面梁剪切弯曲时,在横截面的中性轴处()。
A.正应力最大,剪应力为零
B.正应力为零,剪应力最大
C.正应力和剪应力均最大
D.正应力和剪应力均为零
参考答案:B
--- Who is _________ tall woman with long hair ?
--- She is our English teacher, _________ we all like her very much.
A.a , and
B.the , but
C.a , but
D.the , and
慈善组织是指什么?