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  3. 共用题干 Which foods should be eaten to keep us healthy?Let us look at some impo...

共用题干 Which foods should be eaten to keep us healthy?Let us look at some impo...

admin2020-12-24  39
问题 共用题干
Which foods should be eaten to keep us healthy?Let us look at some important vitamins for these answers.
Vitamin A helps prevent skin and other tissues from becoming dry.People who do not get enough vitamin A cannot see well in darkness.Vitamin A is found in fish liver oil.It also is in the yellow part of eggs.Sweet potatoes,carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A.
Vitamin B-one changes starchy（含淀粉的）foods into energy. It also helps the heart and nervous system work smoothly.Without it,we would be weak and would not grow.Vitamin B-one is found not just in whole grains like brown rice,but also in other foods.These include beans and peas,nuts,and meat and fish.
Vitamin B-twelve is needed so folic acid（叶酸）can do its work. Together, they help produce red blood cells.Vitamin B-twelve is found naturally in foods such as eggs,meat,fish and milk products.Folic acid has been shown to prevent physical problems in babies when taken by their mothers during pregnancy.Vitamin B-twelve is found in green leafy vegetables and other foods,like legumes and citrus fruits.In some countries,it is added to products like bread.
Vitamin C is needed for strong bones and teeth,and for healthy blood passages.It also helps wounds heal quickly.The body stores little vitamin C.So we must get it every day in foods such as citrus（柑橘类）fruits,tomatoes and uncooked cabbage.
Vitamin D increases levels of the element calcium in the blood.Calcium is needed for nerve and muscle cells to work normally.It also is needed to build strong bones.Ultraviolet light from the sun changes a substance in the skin into vitamin D.Fish liver oil also contains vitamin D.
Vitamin K is needed for healthy blood.It thickens the blood around a cut to stop bleeding. Vitamin K can be found in pork products,liver and in vegetables like cabbage,kale and spinach.
选项 In most countries,vitamin B-twelve is added to products like bread.
A:Right       
B:Wrong       
C:Not mentioned
答案B
解析第二段第四句说，蛋黄也含有维生素A。因此选A。
第三段最后两句说，维生素B，不仅存在于全谷类食品，如糙米，还存在于其他的食物里，包括豆类、坚果、肉类和鱼类。因此选B。
第四段最后一句："In some countries, it is added to products like bread.”在一些国家，它被添加到面包等产品中，而不是in most countries。因此选B。
第五段最后一句说，所以我们必须每天食用柑橘类水果、西红柿和生卷心菜以摄取维生素C。因此选A。
第二段第三句说，鱼肝油富含维生素A。第六段最后一句说，鱼肝油也含有维生素D。因此选D。
最后一段说，健康的血液需要维生素K。它通过增加创口周围的血液私稠度来止血。猪肉产品、肝脏和蔬菜（像卷心菜、甘蓝和菠菜）富含维生素K。因此选B。
维生素有助于人体健康，但文章并没有提到维生素越多越好，因此选择C。
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