contact
A. a person you can get information or assistance from
B. of great worth or importance
C. a promise or assurance that something will happen
on a regular basis
A. frequently or habitually
B. a series of actions/steps taken to achieve something
C. difficult to deal with, intimidating
快速成型技术可以制造任意复杂的三维几何实体。利用离散/堆积成型的原理，将十分复杂的三维制造过程简化为二维过程的叠加。
A. 对
B. 错
快速成形过程中，信息过程和材料过程的一体化，不适合成形材料为非均质的原型。
A. 对
B. 错
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