A _____ is a nest equipped with a door that automatically closes when the bird enters

a. trap door c. box nest
b. trap nest d. laying crate


B

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Wood trusses can be used to frame a floor or a roof. Which of these two is referred to as a parallel-chord truss ?

What will be an ideal response?

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Se debe retirar del servicio una cadena si cualquier parte está desgastada en más del _____ por ciento.

a. 15 b. 25 c. 40 d. 50

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The cotton gin

What will be an ideal response?

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____ use(s) units of degrees, minutes, and seconds.

A. Weight B. Time C. Angular dimensions D. Linear dimensions

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