如图表示不同食物成分在消化道中被消化的程度，据图回答：
（1）乙是______的消化曲线；丙是______的消化曲线．
（2）淀粉在消化道中开始进行消化的部位是[A]______；淀粉被消化成______才能被吸收．
营养物质进入消化道的先后顺序是：口腔、咽、食道、胃、小肠、大肠和肛门，其中具有消化功能的器官是口腔、胃、小肠．淀粉在口腔内就开始消化，蛋白质在胃内开始消化，脂肪只能在小肠内消化．
（1）从图中可以看出，物质甲最先被消化，然后是物质乙被消化，最后是丙被消化，可以判断甲是淀粉，乙代表蛋白质，丙代表脂肪．
（2）淀粉在消化道中开始进行消化的部位是[A]口腔，在唾液淀粉酶的作用下变成麦芽糖；最终淀粉在小肠内被消化成葡萄糖，被消化道壁吸收．
故答案为：（1）蛋白质；脂肪；
（2）口腔；葡萄糖．
| 阅读理解。 |
| Fire can help people in many ways. But it can also be very harmful. Fire can make water hot and house warm, give light and cook food. But fire can burn (燃烧) things, too. It can make trees, houses, animals and other things catch fire (起火). If some people can't run away from fire, it can kill them. This happens in every country every year. Sometimes big fire can burn forests. A month ago, a large forest fire broke out in Yunnan Province. It lasted nearly half a month. The forest in Heilongjiang Province and the grassland in Inner Mongolia caught fire in May, 2006. After more than ten days' fight, over 30,000 people and soldiers put out (扑灭) the fire at last. Nobody knows clearly when people began to make fire, but there are many interesting stories about the first time a man or a woman started a fire. One story from Australia tells about a man who went to the sun and brought fire down a long time ago. Today people know how to make a fire with matches (火柴). Children sometimes like to play with them. But matches can be very dangerous. The match can burn a piece of paper and then it can burn a house. A small fire can become a big fire, and destroy many things. Fire kills many people every year. So you must be careful with fire. |
| 1. The main idea of the passage is that _____. |
[ ] |
| A. fire is dangerous and harmful B. forest fire can be easily put out C. who started a fire the first time D. every month there is a forest fire in Yunnan Province |
| 2. Matches can be dangerous because _____. |
[ ] |
| A. they always burn a house B. they can make things catch fire C. they can burn a piece of paper D. they kill many animals every year |
| 3. Which of the following is TRUE? |
[ ] |
| A. Someone started a fire in Heilongjiang Province. B. Fire was brought down from the sun long, long ago. C. We can only make a fire with a match. D. Playing with fire is dangerous. |
| 4. The word"destroy" in the passage means _____ in Chinese. |
[ ] |
| A. 破灭 B. 炸毁 C. 毁灭 D. 粉碎 |
| 5. The writer of the passage wants to tell us that _____. |
[ ] |
| A. we know when man began to make a fire B. people should use fire carefully C. fire can burn down all things in the world D. all children like to play with matches |