题目

Many lifestyle patterns do such ________ great harm to health that they actually speed up ________ weakening of the human body. A.a;/ ­                           B./;the C.a;the                            D./;/ 答案:B有关生物膜系统的正确说法是A.糖被与细胞的保护、识别、免疫和主动运输等有关B.生长激素和神经递质的分泌过程体现了膜的流动性C.用蛋白酶处理生物膜将改变其结构,但不影响其选择透过性D.细胞膜、核膜、细胞器膜成分比例和结构相同,功能密切配合
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