问题
选择题
| I the living room all day, and I'll finish it this evening. |
A. have painted B. have been painting C. paints D. painted |
答案
答案：B
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| I the living room all day, and I'll finish it this evening. |
A. have painted B. have been painting C. paints D. painted |
答案：B
25（HRB335级）纵向受力钢筋，当发生正截面破坏时，属于下列（）种情况（提示：ρmax=0.55fc/fy=0.55，as=40mm）