关于正投影的积聚的说法正确的是()。
A、横断竖不断、主线断开
B、竖断横不断、主线不断开
C、横断竖不断、主线不断开
D、竖断横不断、主线断开
参考答案:C
I watched the man for a long time and wanted to know _______. [ ]
A. whether I have seen him before
B. where I had seen him before
C. that I had seen him before
D. when did I see him
()是掌握企业资产状况,反映企业各类机械设备拥有量、机械设备分布及其变动情况的主要依据,作为掌握机械设备基本情况的基础资料。
A、机械设备登记卡片
B、机械设备台帐
C、机械设备档案
D、机械设备设计图纸