复合图形建模的基本步骤是（ ）。 A: 创建模型→attach→trim→weld→extrude B: 创建模型→attach→weld→trim→extrude C: 创建模型→trim→attach→weld→extrude D: 创建模型→weld→trim→attach→extrude

The brazing weld need annealing heat treatment so that it is easily machined.。（ ）

The brazing weld need annealing heat treatment so that it is easily machined. A: 正确 B: 错误

添加样条曲线节点的命令是（） A: MakeFirst B: Refine C: Outline D: Weld

在EditSpline命令中，执行以下哪种操作可将二维图形封闭（） A: Weld B: Fuse C: Connect D: Break

3dsmax多边形建模,模型有开口，选择边界后，使用（ ）命令可以封口。 A: Connect B: Weld C: Bridge D: Cap

Auto-tempering occurs after welding when （ ）. A: carbon content of weld is low B: cooling rate is slow C: peak temperature is high D: Ms is high

下列操作不能用来对二维样条线上的点进行操作的是（ ）。 A: Refine B: Weld C: Outline D: Fillet

使用样条线的布尔运算可以省去的步骤是（ ）。 A: Attach附加 B: Trim修剪 C: Weld焊接 D: Extrude挤出

In the electron micrograph below, the structure labeled D primarily does which of the following A: Forms a spot weld between cells B: Interacts with actin in the cytoplasm of the apical cytosol C: Facilitates communication between adjacent cells D: Seals membranes between cells E: Moves microvilli