第二章Which coordinates are related to H projection of a point?
答案:x,y
How can you represent V projection of a point?
答案:a'
Which projection accumulates as a point for a H perpendicular line?
答案:H
Which projection is the true length for a frontal line?
答案:V projection
How many types of parallel line are there relative to projection plane?
答案:3
How many relationships between two lines?
答案:3;4
If two projections of two lines are parallel, then the two lines are parallel in space
答案:错
The true length projection of a line appears in a projection plane that is parallel to the line
答案:对
Two lines are parallel in space provided that their respective projections on two projection planes are parallel.
答案:对
If a line is parallel to any line in a plane, the line is parallel to the plane.
答案:对
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