Una escalera recta se debe usar en suelo estable y nivelado, a menos que:
a. la escalera venga equipada con bases antideslizantes especiales.
b. esté asegurada en la parte superior y en la parte inferior para evitar que se mueva.
c. haya alguien al pie de la escalera que la sostenga.
d. haya alguien que sostenga la escalera desde arriba.
Answer: B
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How many pounds of each feedstuff are needed to make 100 pounds of a balanced ration?
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Indicate whether the statement is true or false
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