[问答题] 简述卷绕过程特点。

通讯的结构主要包括几部分（）。 ["标题","导语","主体","结束语"] When the tilting box of a variable stroke axial-piston pump is perpendicular to the pump shaft, which of the following conditions will exist?（） ["The pistons reciprocate","The ‘B’ end cylinder barrel rotates","There is no fluid flow","Power is transmitted hydraulically"] 以下氨基酸直接由遗传密码编码的是（） ["胱氨酸","羟脯氨酸","硒代半胱氨酸","吡咯赖氨酸"] 信贷档案要按规定分类设区建立，权证类、客户基本情况类资料入库保管，信贷业务类要按规定顺序整理存放，专夹保管。 下面属于顾恺之的论画名文的是（）。 ["《论画》","《画云台山记》","《晋魏胜流画赞》","《洛神赋图》"] 简述卷绕过程特点。