【多选题】Food freezing systemscan be divided in to two systems,inclued .
A.
indirect-contace systems
B.
direct-contace systems
C.
a plate freezing system
D.
a scraped-surface continuous freezing systems
【判断题】A key factor in food freezing is how fast the food is frozen.
【判断题】Freezing can improve the quality or texture of any food.
【单选题】在体积为 V ,绝热良好的刚性密闭容器中发生一化学反应,结果系统的温度升高、压力增大,该过程的 △H ( )(天津大学)
【单选题】Warmblooded animals live an active life even in freezing winter,which helps them to ________ their normal body temperature.
【判断题】“互联网+”中国大学生创新创业大赛采用校级初赛、省级复赛、全国总决赛三级赛制。( )
【单选题】In food freezing, there are some factors which damage the food quality, because of .
A.
the growth of ice crystals
B.
the migration of moisture from cells
C.
the increase of solute concentration
【单选题】在体积为V,绝热良好的刚性密闭容器中发生一化学反应,结果系统的温度升高,压力增大,该过程△H()