息税前利润可以用利润总额加上利息费用计算。（）
After passing through the expansion valve the refrigerant should be in the state of （）. ["vapor","liquid","solid","None of the above is tree"]
燃气加臭装置不得（）燃气。 ["泄漏","关闭","打开"]
专业版可以办理（）的功能申请。 ["转账汇款","网上支付","智能通知","付款计划"]
简述毛管虫病的症状和病理变化。
混合料加热有哪些方法？
