Question

    If you're like most kids, you've probably heard at least one parent say, "Don't forget to take your vitamin(维他命)!" or "Eat your salad — it's packed with vitamins!" But what exactly are vitamins?

Vitamins and minerals are substances that are found in foods we eat. Your body needs them to work properly, so you grow and develop just like you should. When it comes to vitamins, each one has a special role to play. For example:Vitamin D in milk and fish helps your bones. Vitamin A in orange fruits and vegetables,liver and milk helps you see at night. Vitamin C in oranges and some green vegetables helps your body heal if you get a cut. Vitamin E in nuts, seeds, whole grains and green, leafy vegetables protects your lungs from becoming damaged by polluted air. B vitamins in green leafy vegetables help your body make energy from food.

When you eat foods that contain fat-soluble(脂溶性的) vitamins, the vitamins are stored in the fat tissues in your body and in your liver. They wait around in your body fat until your body needs them.

Fat-soluble vitamins are happy to stay stored in your body for a while — some stay for a few days, some for up to 6 months! Then, when it's time for them to be used, special carriers in your body take them to where they're needed. Vitamins A, D, E, and K are all fat-soluble vitamins.

Water-soluble vitamins are different. When you eat foods that have water-soluble vitamins, the vitamins don't get stored as much in your body. Instead, they travel through your bloodstream. Whatever your body doesn't use comes out of your body. So these kinds of vitamins need to be replaced often because they don't stick around! This crowd of vitamins includes vitamin C and the big group of B vitamins — B1 , B2 , B6 , B12 and so on.

1.The first paragraph of the passage is used to ________.

A.tell us the special use of salad

B.lead to the topic of the passage

C.advise kids to take more vitamins

D.show readers the value of vitamins

2.If a man suffers from night blindness, he’d better take more ____.

A.vitamin D B.vitamin A

C.vitamin E D.vitamin C

3.What is special about fat-soluble vitamins?

A.They can stay stored in our bodies for some time.

B.They are needed in our bodies every minute.

C.They can be easily produced in our bodies.

D.They contain all kinds of vitamins.

4.After reading the passage, we learn that ____.

A.kids need a lot more vitamins than adults

B.water-soluble vitamins stay long in our bodies

C.fat-soluble vitamins need to be replaced very often

D.vitamins play a great role in the development of our bodies

Answer

1.B

2.B

3.A

4.D

【解析】

本文是说明文。文章介绍了哪些食物含有维他命，各种维生素改善体内的作用，强调了维生素对人体发展的重要性。

1.

推理判断题。

根据第一段If you're like most kids, you've probably heard at least one parent say, "Don't forget to take your vitamin(维他命)!" or "Eat your salad — it's packed with vitamins!" But what exactly are vitamins?如果你像多数孩子一样，你可能听说父母不止一遍的提醒别忘吃维他命或吃沙拉，富含维他命。但是到底维他命是什么呢？可知第一段以提问方式点明主题。故选B。

2.

细节理解题。根据第二段Vitamin A in orange fruits and vegetables,liver and milk helps you see at night.得知橙色水果和蔬菜、肝脏和牛奶中含有的维生素A可以帮助你在晚上看到物体。如果夜盲症可以多吃维生素A。故选B。

3.

细节理解题。根据第三段When you eat foods that contain fat-soluble(脂溶性的) vitamins, the vitamins are stored in the fat tissues in your body and in your liver. They wait around in your body fat until your body needs them.得知，当你吃含有脂溶性维生素食物时，这些维生素会储存在你体内的脂肪纤维中，它们会停留在你的身体脂肪里，直到你的身体需要它们。故选A。

4.

推理判断题。根据第二段Vitamins and minerals are substances that are found in foods we eat. Your body needs them to work properly, so you grow and develop just like you should. 可知，维生素和矿物质是在我们吃的食物中发现的物质。 你的身体需要它们来正常工作，所以你就会像你应该的那样成长和发育。由此判断出维他命在我们的身体发展中起到重要的作用。故选D。