Vitamin A helps to protect skin(皮肤) from becoming dry.It is also helpful to the eyes.Without vitamin A,you cannot see well in darkness.Vitamin A is found in animal liver(肝脏) and the yellow part of eggs.Sweet potatoes,carrots and other dark-coloured fruit and vegetables have something that body can change into vitamin A. |
Vitamin B changes food into energy and helps the heart and nerve system(神经系统) to work smoothly.Without it,we will be weak and will not grow.It is found in grains and other foods like beans,nuts,meat and fish. Vitamin B helps to produce red blood cells(红血球).It is found in food like eggs,meat,fish,milk and green vegetables. |
Vitamin C is needed for strong bone and teeth,and for healthy blood vessels(血管).It also helps wounds(伤口) to cure quickly.The body stores little vitamin C,so we must get it everyday in foods like oranges,tomatoes and cabbage. |
Vitamin D increases the level of calcium(钙) in the blood.Calcium is needed for nerve and muscle cells to work normally,as well to build strong bones.Fish liver oil has vitamin D.In some countries,milk producers add vitamin to milk so that it will be good for children. |
分析 文章大意:
文中介绍了四种维生素及其不同的作用,其中维生素A对眼睛有好处,维生素B在蛋、肉、鱼以及蔬菜中含量很多,对神经系统有好处,维生素C对强健骨骼和牙齿有好处,并且对血管有好处,维生素D有助于提高血液中钙的含量,牛奶中含量较多.
解答 1.A,推理判断题,文中提到"Without vitamin A,you cannot see well in darkness"缺少维生素A时,在晚上会看不清楚,选择A.
2.C,推理判断题,文中提到"It is found in food like eggs,meat,fish,milk and green vegetables."维生素B在蛋、肉、鱼,牛奶以及蔬菜中含量很多,选择C.
3.C,推理判断题,文中提到"Vitamin C is needed for strong bone and teeth,and for healthy blood vessels"维生素C对强健骨骼和牙齿有好处,并且对血管有好处,选择C.
4.C,推理判断题,文中提到"Vitamin D increases the level of calcium(钙) in the blood"维生素D有助于提高血液中钙的含量,选择C.
5.D,推理判断题,文中介绍了四种维生素及其不同的作用,从中我们可以知道,维生素虽然都很少,但是对身体健康是很重要的,选择D.
点评 对于阅读表达题,一定要记得首先通读全文,了解文章大意,然后再根据文章关键词,关键句,掌握细节问题,并进行推理判断,再去回答具体的问题.
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