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下图是桑格和尼克森在1972年提出的关于生物膜分子结构的流动镶嵌模型，请回答： (1)细胞膜的基本骨架是_________(填字母)，与细胞识别有关的结构是(填字母)_________，细胞的识别实际上是一个信息传递过程，高等植物细胞间可通过_____________结构进行信息传递。在人体内信号分子被输送到靶细胞时，首先与靶细胞表面或内部的受体结合。下列物质属于信号分子的是_______。 A．唾液淀粉酶 B．性激素 C．生长激素 D．呼吸氧化酶 (2)细胞膜的结构特点是_______，其功能特性是________。 (3)细胞膜、______和_______共同成为细胞内的生物膜系统。
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【单选题】流沙河有一首诗:饥饿的年代理想是温饱,温饱的年代理想是文明;离乱的年代理想是安定,安定的年代理想是繁荣。这首诗体现了理想具有( )。
A.
阶级性
B.
预见性
C.
时代性
D.
主观性
【简答题】A．They were working in Norwich city center. B．They were on holiday. C．They were driving the vehicle round the city. D．They were waiting for their wives.
【简答题】A．They were severely punished. B．They were treated well. C．They were sold to another white man. D．They were given different work.
【简答题】A．They were severely punished. B．They were treated well. C．They were sold to another white man. D．They were given different work.
【多选题】以下关于现金限额叙述正确的是( )。
A.
现金的限额是指为了保证企业日常零星开支的需要，允许单位留存现金的最低数额
B.
现金的限额是指为了保证企业日常零星开支的需要，允许单位留存现金的最高数额
C.
现金限额由开户银行根据单位的实际需要核定，一般按照单位3~5天日常零星开支的需要确定
D.
边远地区和交通不便地区开户单位的库存现金的现金限额，可按多于5天但不超过10天的日常零星开支的需要确定
【单选题】What were Yang and her husband doing that day? A) They were at work. B) They were driving their daughter to school. C) They were driving some children in a minibus to school. D) They were going to a m...
A.
They were at work.
B.
They were driving their daughter to school.
C.
They were driving some children in a minibus to school.
D.
They were going to a market.
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