Department of the Army TRADOC Reg 350-XX

Suppose all round objects presented to teach the concept “round” were red. A red ball is an example of “round,” not because it is red, but because it rolls. A red cube would be a nonexample of round—it is red, but it does not roll. ... The assistant gunner on the M-102 Howitzer has the responsibility for setting the quadrant on the ... ................
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