用于控制粒子物体Snow（雪）渲染尺寸参数是（）.

A:Viewport Count B:Render Count C:Drop Size D:Speed

单击视口标签后会弹出一个右键菜单，从该菜单中选择什么命令可以改进交互视口中贴图的显示效果。（）

A:Viewport Clipping B:Texture Correction C:Disable View D:Show Safe Frame

执行菜单视图Views>视口背景Viewport Background命令，可以为当前激活视图设置背景图，如果希望背景图跟随视口同时进行缩放和平移，则需要在视口背景Viewport Background面板中设置的选项有？（）

A:匹配视口Match Viewport、显示背景Display Background B:匹配位图Match Bitmap、显示背景Display Background、锁定缩放/平移Lock Zoom/Pan C:匹配视口Match Viewport、显示背景Display Background、锁定缩放/平移Lock Zoom/Pan D:使用环境背景UseEnvironmen tBackground、显示背景Display Background

单击视口标签后会弹出一个右键菜单，从该菜单中选择哪个命令可以改进交互视口中贴图的显示效果？（）

A:Viewport Clipping B:Texture Correction C:Disable View D:Show Safe Frame

在场景中，打开和关闭对象的变换坐标系统的命令是（）。

A:Views/Viewport Background B:Views/Show Transform Gizmo C:Views/Match Camera to View D:Views/Show Key Times

Sequential circuit is a common logic device whose output values, at a given instant, depend upon its input values and the internal state at that instant, and whose internal state depends upon the (66) preceding input values and the preceding internal state. A sequential circuit can assume a finite number of internal states and may therefore be regarded, from an abstract (67) , as a finite (68) .
Combinational circuit is another logic device whose output values, at any given instant, depend upon the input values at that instant. A combinational circuit is a (69) of a sequential circuit whose internal state is not taken (70) .

A:idea B:observation C:point of view D:viewport

Sequential circuit is a common logic device whose output values, at a given instant, depend upon its input values and the internal state at that instant, and whose internal state depends upon the (66) preceding input values and the preceding internal state. A sequential circuit can assume a finite number of internal states and may therefore be regarded, from an abstract (67) , as a finite (68) .
Combinational circuit is another logic device whose output values, at any given instant, depend upon the input values at that instant. A combinational circuit is a (69) of a sequential circuit whose internal state is not taken (70) .

A:idea B:observation C:point of view D:viewport