机械中的制造单元体和运动单元体分别是 。(山西省2015年专升本选拔考试)
A. 构件、机构
B. 零件、构件
C. 部件、零件
D. 构件、零件
机械零件丧失预定功能或降低到许用值以下的现象,称为机械零件。
Sketching traditionally refers to a preliminary rough type ofdrawingthat an artist might make in preparation for either apaintingor a more formal drawing.
A. 粗糙的
B. 大致的
C. 粗野的
D. 猛烈的
Formally however it is a useful way for an artist to capture a fleeting impression of a scene or person before it changes.
A. 简短的
B. 稍纵即逝的
C. 舰队
D. 逃离