改错。13-7=20改正：_______14+6=10改正：_______13-_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

改错。

13-7=20
改正：_______

14+6=10
改正：_______

13-5=12
改正：_______

答案

13-7=6；14+6=20；13-5=8

选择题

It was in the small house ___ was built with stones by his father ___he spent his childhood .

A．which , that

B．that , where

C．which , which

D．that , which

单项选择题

圬工梁、拱及墩台应具有要求的强度、刚度、抗渗、耐久性和整体稳定性，并经常保持状态良好。混凝土保护层中性化大于（），应及时处理。

A.10mm

B.15mm

C.20mm

D.25mm