【单选题】【消耗次数：1】
人体O2、CO2进出细胞膜是通过（ ）
①
单纯扩散
②
易化扩散
③
主动转运
④
入胞作用
参考答案：
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相关题目
【单选题】
细胞膜对物质进行主动转运和被动转运的主要区别是（）
①
转运中是否消耗能量
②
转运脂溶性或水溶性物质
③
单纯扩散或易化扩散
④
经载体扩散或经通道扩散
⑤
入胞或出胞
【单选题】
奥氏气体分析仪测定半水煤气中①CO2；②O2；③CO；④CH4和H2；⑤N2的顺序是（）。
①
A.①②③④⑤
②
B.⑤③④②①
③
C.④②①③⑤
④
D.⑤④③②①
随机题目
【单选题】
由于幼儿的肌肉中水分多，蛋白质及糖原少，不适合他们的运动项目是( )。
①
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②
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③
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④
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