下图为高等动物的体内细胞与外界环境的物质交换示意图下列叙述正确的是a.��都必须通过消化系统才能完成 b.人体的体液包括内环境和细胞外液 C Template




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tomski下图为高等动物的体内细胞与外界环境的物质交换示意图下列叙述正确的是a.��都必须通过消化系统才能完成 b.人体的体液包括内环境和细胞外液 c coloring