reasons is(4) , varies from people to people. The more melanin a person has, the (5) his or her skin will be. Vitamin D is another source(6) skin color. Vitamin D is necessary for humans to build bones. Sunlight contributes to vitamin D in the skin. The earliest people in Africa had dark skin with hair covering it because the sunlight is very strong. When they moved to places where they could not get Historical reasons enough sunlight to(7) vitamin D, their skin color became lighter. Generally speaking, people in areas with strong sunlight have darker skin(8) people in other areas have lighter skin. Melanin(10) an important role in our skin color. With (9) our living environment changing, melanin production is changed, which leads to the changes in our skin color. 3
(2013·池州模拟)
阅读下面短文, 根据所读内容在表格中的空白处填入恰当的单词。
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Researchers from the University of Michigan reported that sympathy,
the ability to understand other people’s feelings and problems among college students had dropped sharply over the past 10 years. That could be because so many people have replaced face time with screen time. Today, people spend more time alone and are less likely to join groups and clubs.
But there is another explanation. Turn on the TV, and you’re showered with news and reality shows full of people fighting, competing, and generally treating one another with no respect. Humans learn by example—and most of the examples on it are anything but sympathetic.
There are good reasons not to follow those bad examples. Humans are socially related by nature. Having relationships with other people is an important part of being human—and having sympathy is vital for those relationships. Researchers have also found that sympathetic teenagers are more likely to have high self-respect. Besides, sympathy can be a cure for loneliness, sadness, anxiety, and fear.
Sympathy is also an indication of a good leader. In fact, many top companies report that sympathy is one of the most important things they look for in new managers. Good social skills—including sympathy—are a kind of “emotional(情感的)intelligence” that will help you succeed in many areas of life.
What’s the best way to develop sympathy? For starters, let down your guard and really listen to others. One doesn’t develop sympathy by having a lot of opinions and doing a lot of talking. In addition, you’d better
