题目

阅读理解Electrical devices(仪器) could soon use power made by human energy. Scientists say theyhave developed an experimental device that produces electricity from thephysical movement of a person walking. British scientist Max Donelan and otherscientists in Canada and the United States developed the device. The device connects to a person's knee. As the person walks, thedevice captures energy each time the person slows down. To do this, the devicehelps with the slowing down movement of the leg. The movements of the walkingperson push parts of a small machine that produces electricity. U如图为在光学显微镜下看到的植物细胞模式图，因为该细胞有细胞壁细胞壁、液泡液泡和叶绿体叶绿体．（1）刀切鲜橙时，流出的黄色汁液主要是细胞液细胞液，它来自图中结构[⑥⑥]液泡液泡．（2）能够控制物质进出细胞的结构是[④④]细胞质细胞质．（3）对细胞具有保护作用的结构是[①①]细胞壁细胞壁．（4）[③③]是绿色的，其体内含有叶绿体叶绿体．