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(阅读理解)
If you could look inside your body, you would see a magnificent machine at work---more magnificent than any machine a person could build. As you are reading these words and understanding them, your body is breathing, hearing, moving, feeling, digesting(消化) your last meal, making you hungry for the next and performing(完成) hundreds more tasks without you even noticing. The different parts of the body do different jobs and each part depends on(依靠) the others. A machine needs fuel(燃料) to make its parts work. Our fuel is our food. When we swallow(吞下) food it goes down into our stomach and mixes with chemicals which break it down into a liquid. This then goes into the intestines(肠), a coiled tube, which take all the good things from the liquid food and move them into our blood. |