We all know that it is 1to keep healthy. But not all people know2to 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 enjoy3 cards at night and don’t go to bed until midnight. Some gamble (赌博) all night. They forget that to get4sleep is good for health. Some never get up early in the5 and take some exercise. It is true that doing exercise is very important for us to keep 6. Some smoke（抽烟）7. Some drink too much wine（酒）. 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 9tired. Vegetables are good to the body. But some don’t like eating vegetables. 10is 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.

某校利用节假日组织学生义务为糖尿病患者检测尿液，看其是否康复．下列叙述不正确的是（　　）

①所用试剂为质量浓度为0.1g/mL的NaOH溶液和0.01g/mL的CuSO₄溶液

②向尿液中先加入NaOH溶液，摇荡均匀后，再加入CuSO₄溶液

③向尿液中加入试剂后，水浴加热，观察是否有紫色反应

④为了使结果更可信，应取等量的含有蔗糖的蒸馏水溶液为对照组．

“全球米贵”令粮食安全危机已经成为世界性难题。为缓解粮食安全危机，不少国家走上了海外屯田之路。日本早就积极开发海外粮库，现在海外屯田的面积已是国内耕地面积的3倍。苏丹由于拥有粮食生产的区位优势，成为海外屯田的热点目的地。结合所学知识回答下面问题。