题目

阅读下面短文，在空白处按要求填入适当的单词或括号内单词的正确形式。每空一词。Thanks to better health care, most people are living     (healthy) and longer lives. Someone who is born today can expect to live about thirty-five years longer than someone who     (be) born in the nineteenth century. Here are five     (rule) for a healthy life.First. Doctors say you should get off the sofa. To keep fit, you have to walk    介词) least 10, 000 steps every day. In the past, people's jobs required more ph下图为真核细胞结构及细胞内物质转运的示意图。请回答下列问题:（1）图中双层膜包被的细胞器有____________（填序号）。（2）若该细胞为人的胰腺细胞，细胞内消化酶合成和分泌的过程中，膜面积先增加后减小的细胞器是____________（填序号），该细胞器在分泌蛋白合成和分泌过程中的作用是____________。（3）若①合成的蛋白质为组成核糖体的蛋白质，推测该蛋白质将被转运到____________（填结构名称）发挥作用。（4）图中不参与构成生物膜系统的是____________（填结构名称）。各种生物膜的结构和化学成分相似，但功能差别较大的原因是____________。