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No people doubt the fundamental importance of mothers in childrearing, but what do fathers do Much of what they contribute is simply being the second adult in the home. Bringing up children is demanding, stressful and exhausting. Two adults can support and make up for each other’s deficiencies and build on each other’s strength.As we all know, fathers also bring an array of’ unique qualities. Some are familiar: protector and role model. Teenage boys without fathers are notoriously prone to trouble. The pathway to adulthood for daughters is somewhat easier, but they must still learn from their fathers, in ways they cannot from their mothers, such as how to relate to men. They learn from their fathers about heterosexual trust, intimacy and difference. They learn to appreciate their own femininity from the one male who is most special in their lives. Most important, through loving and being loved by their fathers, they learn that they are love-worthy.Current research gives much deeper—and more surprising insight into the father’s role in childrearing. One significantly overlooked dimension of fathering is play. From their children’s birth through adolescence, fathers tend to emphasize game more than caretaking. The father’s style of play is likely to be both physically stimulating and exciting. With older children it involves more teamwork, requiring competitive testing of physical and mental skills. It frequently resembles a teaching relationship: come on, let me show you how. Mothers play more at the child’s level. They seem willing to let the child directly play.Kids, at least in the early years, seem to prefer to play with daddy. In one study of two and half years old who were given a choice, more than two-thirds chose to play with their fathers.The way fathers’ play has effects on everything from the management of emotions to intelligence and academic achievement. It is of particular importance in promoting self-control. According to one expert, "children who roughhouse with their fathers quickly learn that biting, kicking and other forms of physical violence are not acceptable." They learn when to "shut it down".At play and in other realms, fathers tend to lay stress on competition, challenge, initiative, risktaking and independence. Mothers, as caretakers, stress emotional security and personal safety. On the playground fathers often try to get the child to swing ever higher, while mothers are cautious, worrying about an accident.We know, too, that fathers’ involvement seems to be linked to enhanced verbal and problem solving skills and higher academic achievement. Several studies found that along with paternal strictness, the amount of time fathers spent reading with them was a strong predictor of their daughters’ verbal ability.For sons the results have been equally striking. Studies uncovered a strong relationship between fathers’ involvement and the mathematical abilities of their sons. Other studies found a relationship between paternal nurturing and boys’ verbal intelligence. According to Paragraph 3, one significant difference between the father’s and mother’s role in child rearing is ().
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Music is often divided into several categories, or groups. Some of the categories are: classical music, traditional music, rock music, and jazz music.The first kind, classical music, refers to orchestra music that originated in Europe a few hundred years ago. Most of the original classical music was composed, or written, in Italy, Germany, Austria, or Russia. Beethoven and Bach were two famous composers of classical music. Classical music is usually played by a variety of string instruments, such as the violin, and by a variety of wind instruments such as the flute.The second type of music is traditional music. Traditional music is music that comes from a particular culture. Every culture has its own special forms of traditional music. For example, "blues" music is one kind of traditional music in the United States and "enka" music is one kind of traditional music in Japan. Each culture has its own traditional music, and its own special instruments for playing its trditional music.Another kind of music is rock music. Rock is generally a loud kind of music, played with a strong beat. Rock musicians often use electric instruments, such as electric guitars and electric pianos, but other instruments can also be used. Rock music probably began in Europe about 30 or 40 years ago. Rock became very popular, especially among young people, during the 1960s and 1970s.The fourth kind of music is jazz. Jazz probably comes from Africa originally. Jazz has a different kind of rhythm from other kinds of music. A variety of musical instruments are used to play this kind of music, especially wind instruments such as the trumpet and saxophone. Often piano, brass, and a variety of percussion instruments are also used. Which of the following is not a place where most original classical music was written().
实现数据库操作的DAO技术，其模型采用的是层次结构，其中处于最顶层的对象是 【12】 。
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