型钢混凝土组合结构构件中,纵筋与型钢的净间距不宜小于()。
A.25mm
B.30mm
C.35mm
D.40mm
参考答案:B
The old woman who______in the deserted house alone for ten years has been settled in a nursing home now.
A.lived
B.has lived
C.had lived
D.has been living
教学过程是一种特殊的认识过程,其特殊性表现在认识的间接性、交往性、教育性和()。
A.有差异性的认识
B.有个性的认识
C.有领导的认识
D.有基本的认识