La diferencia entre una forma deslizante y una forma trepa- dora es que _____.
a. la forma trepadora se
mueve a una velocidad
fija
b. la forma deslizante se
mueve a una velocidad fija
c. la forma trepadora no
tiene una plataforma
secundaria de trabajo
d. generalmente la forma
trepadora se levanta con
una grúa
Answer: B
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