石膏板、钙塑板当采用钉固法安装时,螺钉与板边距离不得小于()mm。
A.8
B.10
C.12
D.15
参考答案:D
我国当前仍然是严重的缺乏人才
All removals to be reassembled in order()of repairs.
A.upon commencement
B.on completion
C.before ending
D.after beginning