6. Which of the following aspects about skin is NOT mentioned in the article?
(A) Its colors.
(B) Its functions.
(C) Its art of marking.
(D) Its diseases.

如果您脫掉皮膚並將其放平，它將覆蓋約1.9平方米的面積，是迄今為止人體最大的組織。皮膚幾乎覆蓋了整個身體，可以保護我們免受各種外力的影響，例如極端溫度，有害陽光，有害化學物質和危險感染。皮膚還充滿神經，使大腦與外界保持聯繫。

   皮膚的健康狀況及其執行保護功能的能力對我們的健康至關重要。但是，對於這個星球上的許多人而言，我們的皮膚外觀同樣重要（甚至更多）。以膚色為例。您的基因決定皮膚的顏色，但是數百年來，人類一直試圖使皮膚變亮或變黑，以使其更具吸引力。在1800年代，許多歐洲人都希望擁有白皙的皮膚。這種顏色意味著其所有者是上層階級的成員，而不必在陽光下工作。在世界某些地方皮膚較黑的人中，如今用於淡化膚色的產品仍然很受歡迎。在20世紀的其他文化中，隨著城市的發展和工作在室內的轉移，對淺色皮膚的態度也發生了相反的變化。曬黑的皮膚開始代表休閒和健康。在當今許多地方，即使人們更加意識到紫外線的危害，在海灘或沙龍曬太陽仍然很受歡迎。就像人們通過改變膚色來顯示出財富或美麗一樣，全球一些文化也在皮膚上做標記，以表明其文化身份或社區地位。例如，紋身已經進行了數千年。古埃及，英國，秘魯和其他地方的領導人穿著紋身，以彰顯其社會重要性或英勇。如今，在新西蘭的毛利人以及薩摩亞，塔希提島和婆羅洲的文化中，全臉紋身仍被用來標識佩戴者是某個家庭的一員，並象徵著該人的成就。

If you took off your skin and laid it flat, it would cover an area of about 1.9 square meters, making it by far the body’s largest organ. Covering almost the entire body, skin protects us from a variety of external forces, such as extremes of temperature, damaging sunlight, harmful chemicals, and dangerous infections. Skin is also packed with nerves, which keeps the brain in touch with the outside world. 

   The health of our skin and its ability to perform its protective functions are crucial to our well-being. However, the appearance of our skin is equally – if not more – important to many people on this planet. Take skin color for example. Your genes determine your skin’s color, but for centuries, humans have tried to lighten or darken their skin in an attempt to be more attractive. In the 1800s, white skin was desirable for many Europeans. This color meant that its owner was a member of the upper class and did not have to work in the sun. Among darker-skinned people in some parts of the world, products used to lighten skin color are still popular today. In other cultures during the 20th century, as cities grew and work moved indoors, attitudes toward light skin shifted in the opposite direction. Tanned skin began to represent leisure time and health. In many places today, sun tanning on the beach or in a salon remains popular, even though people are more aware of the dangers of UV rays.     Just as people have altered their skin color to show wealth or beauty, some cultures around the globe marked their skin to indicate cultural identity or community status. Tattooing, for instance, has been carried out for thousands of years. Leaders in ancient Egypt, Britain, Peru and other places wore tattoos to demonstrate their social importance or bravery. Today, among the Maori people of New Zealand as well as cultures in Samoa, Tahiti, and Borneo, full-facial tattoos are still used to identify the wearer as a member of a certain family and to symbolize the person’s achievements.

6. Which of the following aspects about skin is NOT mentioned in the article?

(D) Its diseases.

(文章沒有提到皮膚疾病)