【单选题】防止蔬菜在远程运输中腐烂变质,对蔬菜会进行真空脱水,其原理是什么?
A.
真空环境的温度极低,可以使蔬菜中的水分快速凝集并升华
B.
真空环境的温度很高,可以使蔬菜中的水分瞬间从液体变为气体
C.
真空环境的空气疏密程度很小,可快速提高蔬菜中水分子的运动速率
D.
真空环境的大气压力很低,可降低水的沸点,使蔬菜中的水分快速从液体变为气体
【简答题】I should say that teaching English in China is are aljob,and the schools 20 you to be professional and you have to 21 .If you don’t meet their requirements, it is easy to get fired.But with 22 and the...
【单选题】提供个性化服务并不容易,关键在于导游()。
B.
前期准备是否充分 D.工作是否突出了个人风格
【单选题】I just ________ seem to get it into my son's head how important it is to learn English well. [ ]
【单选题】在微循环中,下列哪种结构主要受局部代谢产物的调节
【简答题】When I decided to get married, my father decided to share some wisdom. “Lori, it is just as easy to love a rich man as it is to love a poor man, “ he said. My boyfriend didn’t have much money, but I l...
【单选题】以下哪一项不属于脚内侧传球的动作技术特点?
【单选题】提供个性化服务并不容易,关键在于导游()