___________ his birthday, he usually has a party. [ ]
A. In
B. At
C. On
D. For
答案:C
砌体结构工程施工质量验收规范(GB50203-2011):砖砌体工程,砖过梁底部的模板,应在灰缝砂浆强度不低于设计强度的()时,方可拆除
A.60%
B.80%
C.50%
D.75%
易致皮肤、口唇、鼻咽干燥的病因是()
A.火邪
B.寒邪
C.湿邪
D.燥邪
E.瘀血