[单选] Which of the following statements is correct with regards to the operation of a centrifugal cargo pump?（）

A . Oil is discharged from the impeller through the outlet
B . Gravity causes the oil to flow toward the discharge
C . The self-priming feature of the centrifugal pump enables it to draw its own suction as it starts
D . The discharge capacity varies directly with the speed of the impeller

停送电信息编译如何进行编译？申请企业法人登记的单位应当具备下列哪些条件（） A.名称、组织机构和章程。 B.固定的经营场所和必要的设施。 C.符合国家规定并与其生产经营和服务规模相适应的资金数额和从业人员。 D.能够独立承担民事责任。简述纱线覆盖系数。在维修总线的双绞线时，导线的平行部分可以有多长（） 1米。 0.5米。 0.2米。 0.05米。（）对于心理因素引起的胸痛的疗效有限，只适用于有严重焦虑症的患者。苯二氮类。阿米替林。对乙酰氨基酚。阿司匹林。 Which of the following statements is correct with regards to the operation of a centrifugal cargo pump?（）

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[单选] Which of the following statements is correct with regards to the operation of a centrifugal cargo pump?（）

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