脚手架作业层上的栏杆上栏杆上皮高度应为（）。
A、1.5m
B、1.2m
C、0.8m
D、0.6m
参考答案：B
He doesn't do his homework _______. So he always makes some mistakes. [ ]
A. careful enough
B. enough careful
C. carefully enough
D. enough carefully
《唐蕃会盟碑》艺术特点
