^ If the hydraulic pump does not give a pressure of 3000 psi, use the electric pump.
如果液压泵不给3000psi的压力，使用电泵。
A.If the hydraulic pump turns to generate pressure of 3000 psi, use the electric pump. B.If the hydraulic pump fails to generate pressure of 3000 psi, use the electric pump. C.If the hydraulic pump turns to supply pressure of 3000 psi, use the electric pump.正确答案B
