加工长度的正确与否,将直接影响工程的质量和进度。因此,()定要周密考虑。
A.安装时
B.测量时
C.预制时
D.下料时
参考答案:D
He was so careless that he left the work half _____ and went to the cinema.
A.do
B.doing
C.done
D.to do
量角时,量角器的直边和角的一条边重合.______.