On an ellipse, the foci are:
A. the center points for the major axis
B. the center points for the minor axis
C. the center point of the ellipse
D. one-half the distance of the minor and major axis
Answer: D
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Fill in the blank(s) with the appropriate word(s).
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A) Adding a condensing recuperative coil B) Flattening and serpentining heat exchangers C) Adding induced draft combustion blowers D) Removing standing pilot lights
This filter circuit passes all signals lying within a band between a lower-frequency limit and an upper-frequency limit
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