什么是直接纺丝法？
在某市工商局组织开展的食品流通许可证发放工作培训班上，要求学员们提出日常工作中常见的可发放流通食品许可证的的几种情形，请问以下哪种学员提出的情形可发放流通许可证（） ["A.销售凉茶","B.同时销售药品、保健品和食品","C.宰杀并销售鲜鱼","D.销售冲泡并打包销售奶茶、咖啡等的甜品站","E.连锁蛋糕店销售由加工中心统一加工但尚未完成预包装的蛋糕"]
Piston compression rings used in a diesel engine function to （） ["transfer heat from the cylinder to the piston","scrape oil from the sides of the piston","seal the combustion space from the crankcases","prevent any piston contact with the cylinder liner"]
什么是连续冷却相变曲线（CCT）？
An indicator card or pressure-volume diagram, shows graphically the （） ["compression ratio of the engine","volume of the engine","relationships between pressure and volume during one stroke of the engine","relationships between pressure and volume during one cycle of the engine"]
什么是熔体纺丝法？
