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Some of the energy fed into the pump will be dissipated as () due to mechanical inefficiencies, the remainder will be converted into pressure rise and fluid velocity.
以下属于中医“胁痛”的有()..
患儿女,10岁,患金黄色葡萄球菌肺炎入院5天,后出现全身皮肤.....
2G用户是否可以使用手机电视业务?..
自励式直流发电机的励磁电流由发电机自身提供。..
文件电子传递时,不包含以下哪些选项?()..
细钢丝铠装聚乙烯套电缆的外护层型号是()。..