A ____--an opening left in a precast member for a window, door, skylight, conduit, ductwork, piping, or for numerous other reasons--is formed by placing a wooden, styrofoam, or cardboard object the size and shape of the desired opening in the fabrication bed before pouring in the concrete.
A. silhouette
B. contour
C. delineation
D. blockout
Answer: D
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