对工件表面缺陷测量长度时，当精度要求较高的情况下，适宜使用下述（）测量工具
A、钢卷尺
B、量角器
C、游标卡尺
D、千分尺
参考答案：A
.
. His family, which _______ rather a large one, ______very fond of their old house.
A．were, were
B．was, were
C．were, was
D．was, was
许可开始工作的命令，应通知工作负责人，其方法可采用（）。
A.当面通知
B.电话下达
C.提前决定
D.派人送达
