视图坐标系在透视图中使用的是（ ）。
A. 屏幕坐标系
B. 世界坐标系
C. 局部坐标系
D. 拾取坐标系
阵列复制不仅能在X、Y、Z三个轴向上形成模型的三维阵列，也可以在X、Y、Z方向上产生旋转角度和缩放比例的变换。
A. 对
B. 错
different types of multimodal transport operation include ().
A. sea/air/sea
B. road/rail/road
C. road/air/road
D. land-bridge
()are the advantages of international multimodal transport.
A. minimizing time loss at transshipment points
B. providing faster transit of goods
C. reducing the burden of documentation and formalities and saving costs
D. establishing more than one agency to deal with
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