问题
选择题
—Your classroom is very clean.
—Yes, it ______ every day. [ ]
A. is cleaned
B. cleans
C. is cleaning
答案
答案：A
搜题请搜索小程序“爱下问搜题”
—Your classroom is very clean.
—Yes, it ______ every day. [ ]
A. is cleaned
B. cleans
C. is cleaning
答案：A
14。砌体沿阶梯形截面破坏的抗震抗剪强度设计值fVE=0.255MPa，A= 1017600mm2。试问，砖墙和构造柱组合墙的截面抗震承载力V(kN)应与下列（）项数值最为接近。