简述玉米的营养特点及利用时应注意的问题？
参考答案：
玉米的营养特点：
1、含有的有效能高
2、玉米中的蛋白质含量低，平均约8.6%，且其蛋白质的品质差
3、玉米的矿物质含量低
4、玉米中含有较丰富的维生素E和维生素B，其他的B族维生素含量较低且不含维生素B
利用时需要注意：
1、由于其极易发霉，感染黄曲霉菌，所以入仓玉米的水分不能超过14%；
2、籽实要整齐均匀、无发酵、结块及异味。
| 完型填空。 | ||||
| We all know that it is _1_to keep healthy. But not all people know _2_to keep healthy. After five days' hard work, we need to have a good rest at weekends. But it seems that some don't know how to spend weekends in the right way. They enjoy _3_ cards at night and don't go to bed until midnight or even later. Some gamble (赌博) all night. They forget that to get _4_sleep is essential (必要的) for health. Some never get up early in the _5_ and take some exercise. It is true that doing exercise is very important for us to keep _6_. Some smoke a lot. They forget that _7_ smokers are more likely (可能) to have lung cancer (肺癌) than those who don't smoke. Some drink too much wine. _8_ too much is harmful (有害) to the body. Some eat too much rich food and get fatter and fatter. If you are much too fat, you may always _9_ tired. Vegetables are good to the body. But some don't like eating vegetables. _10_ is also very good to body. As a saying (谚语) goes, "An apple every day keeps the doctor away." So don't forget to eat some fruit. | ||||
|