切角机不同弧度大小的圆角是通过更换和使用不同弧度大小的圆角刀获得的。
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对于可疑文件物证的勘验时,必须采用首先固定文件原貌,然后再提取。()
A. 正确
B. 错误
IP在首部有8bit的协议域,其中6表示TCP协议,17表示UDP协议。
A. 正确
B. 错误
Before starting a gasoline engine on a motorboat,you should make sure for safety that().
A. the gasoline tank is full
B. the bilges,cabins,etc. are thoroughly ventilated
C. you have fresh water on board
D. Each of the above is followed