Question

    We all need Vitamin （维生素）D because it helps to build and keep strong bones. A lack of it can lead to some bone diseases. As studies show, sunlight is great for making Vitamin D. When you're outdoors, your body will create the Vitamin D you need from direct sunlight on your skin.

In order to get enough Vitamin D, you should get 10-30 minutes of sunlight at a time, several times a week. However, people with darker skin may need a little more time than this. Besides, your exposure （暴露）time in the sunlight should rely on how sensitive your skin is to sunlight. Too much sunlight can be dangerous, for it may cause some bad results, including sunburn, eye damage, and skin problems. If you have to stay in the sunlight for a long time, you should be careful not to let sunlight hurt your skin, so take care to protect your skin with sunscreen before it starts to turn red.

In a word, your ability to make Vitamin D from sunlight depends on the time of day, your skin color, where you live and so on. Keep those in mind when you go out for Vitamin D from sunlight.

1.Why do people need Vitamin D according to Paragraph 1?

A.To keep their hair healthy. B.To make their teeth white.

C.To make their faces pretty. D.To keep their bones strong.

2.We can infer that our body creates Vitamin D by______________.

A.doing some exercise B.losing much weight

C.staying in the sunlight D.walking in the moonlight

3.What is the bad result if you stay in the sunlight too long?

A.Lung diseases. B.Skin problems.

C.Heart diseases. D.Breath problems.

4.What does the underlined word "sunscreen'' in Paragraph 2 probably mean?

A.防晒霜 B.防水服 C.防尘罩 D.防腐剂

5.Where is the text probably taken from?

A.A story book. B.A telephone book.

C.A health magazine. D.A music magazine.

Answer

1.D

2.C

3.B

4.A

5.C

【解析】

这是一篇说明文。文章讲述了维生素D对身体的好处，以及获得维生素D的方法和注意事项。

1.

细节理解题。根据文章第一句We all need Vitamin （维生素）D because it helps to build and keep strong bones.可知，我们都需要维生素D，因为它有助于强健骨骼。故选D。

2.

推理判断题。根据第一段As studies show, sunlight is great for making Vitamin D. When you're outdoors, your body will create the Vitamin D you need from direct sunlight on your skin.可知，研究表明，阳光对制造维生素D很有帮助，当你在户外时，你的身体会从阳光直射到皮肤上产生你需要的维生素D。由此可推知，我们的身体是通过晒太阳产生维生素D的。故选C。

3.

细节理解题。根据第二段Too much sunlight can be dangerous, for it may cause some bad results, including sunburn, eye damage, and skin problems. 可知，过多的阳光会很危险，因为它可能会导致一些不好的结果，包括晒伤、眼睛损伤和皮肤问题。故选B。

4.

词义猜测题。根据划线单词前一句If you have to stay in the sunlight for a long time, you should be careful not to let sunlight hurt your skin,可知，如果你必须长时间呆在阳光下，你应该小心不要让阳光伤害你的皮肤；再结合划线单词所在句so take care to protect your skin with sunscreen before it starts to turn red.可知，要注意在皮肤开始变红之前用防晒霜保护皮肤，由此可知，划线单词 "sunscreen'' 的意思是“防晒霜”。故选A。

5.

推理判断题。阅读文章可知，本文讲述了维生素D对身体的好处，以及获得维生素D的方法和注意事项。由此可知，本文可能出自一本健康杂志。故选C。