简述杯体虫病（又称为舌杯虫）的感染途径。
When the dew point of the outside air is lower than or equal to the dew point of the air in the cargo hold，you should（）. ["secure all ventilation","shut down the exhaust blowers","shut down the intake blowers","ventilate the cargo hold"]
优先股和可转换债券既具有债务筹资性质，又具有权益筹资性质。（）
Both the temperature and the pressure of the refrigerant are increased in the （）. ["compressor","condenser","evaporator","expansion valve"]
融资租赁的固定资产视为企业自有固定资产管理，这种筹资方式必然会影响企业的资本结构。（）
烧结配料有哪几种方法，一般烧结配料采用哪种方法？
