Tính tổng các nghiệm của phương trình .                         

Một hộp có 6 viên bi xanh, 5 viên bi đỏ và 4 viên bi vàng.Chọn ngẫu nhiên 5 viên bi sao cho có đủ cả ba màu.Số cách chọn là         

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50:

Psychologist have debated a long time about whether a child’s upbringing can give it the ability to do outstandingly well. Some think that it is impossible to develop genius and say that it is simply something a person is born with. Others, however , argue that the potential for great achievement can be develop. The truth lies somewhere between these two extremes. It seems very obvious that being born with the right qualities from gifted parents will increase a child’s ability to do well. However, this ability will be fully realized only with the right upbringing and opportunities. As one psychologist says, “ To have a fast car, you need both a good engine and fuel.’’ Scientists have recently assessed intelligence, achievement, and ability in 50 sets of identical twins that were separated shortly birth and brought up by different parents. They found that achievement was based on intelligence, and later influenced by the child’s environment. One case involving very intelligent twins was quoted. One of the twins received a normal upbringing, and performed well. The other twin, however, was brought up by extremely supportive parents and given every possible opportunity to develop its abilities. That twin, thought starting out with the same degree of intelligence as the other, performed even better. This case reflects the general principle of intelligence and ability. The more favorable the environment, the more a child’s intelligence and ability are developed. However, there is no link between intelligence and socioeconomic level of a child’s family. In other words, it does not matter how poor or how rich a family is , as this does not affect the intelligence. Gifted people can not be created by supportive parents, but they can be developed by them. One professor of music said that outstanding musicians usually started two or three years earlier than ordinary performers, often because their parents had recognized their ability. These musicians then needed at least ten years’ hard work and training in order to reach the level they were capable of attaining. People who want to have very gifted children are given the following advice: Marry an intelligent person. Allow children to follow their own interests rather than the interests of the parents. Start a child’s education early but avoid pushing the child too hard. Encourage children to play; for example, playing with musical instrument is essential for a child who wants to become an outstanding musician.

Question 45: When scientists studied intelligence and ability in twins, they found that____.         

Tìm số hạng chứa  trong khai triển ?        

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50:

Psychologist have debated a long time about whether a child’s upbringing can give it the ability to do outstandingly well. Some think that it is impossible to develop genius and say that it is simply something a person is born with. Others, however , argue that the potential for great achievement can be develop. The truth lies somewhere between these two extremes. It seems very obvious that being born with the right qualities from gifted parents will increase a child’s ability to do well. However, this ability will be fully realized only with the right upbringing and opportunities. As one psychologist says, “ To have a fast car, you need both a good engine and fuel.’’ Scientists have recently assessed intelligence, achievement, and ability in 50 sets of identical twins that were separated shortly birth and brought up by different parents. They found that achievement was based on intelligence, and later influenced by the child’s environment. One case involving very intelligent twins was quoted. One of the twins received a normal upbringing, and performed well. The other twin, however, was brought up by extremely supportive parents and given every possible opportunity to develop its abilities. That twin, thought starting out with the same degree of intelligence as the other, performed even better. This case reflects the general principle of intelligence and ability. The more favorable the environment, the more a child’s intelligence and ability are developed. However, there is no link between intelligence and socioeconomic level of a child’s family. In other words, it does not matter how poor or how rich a family is , as this does not affect the intelligence. Gifted people can not be created by supportive parents, but they can be developed by them. One professor of music said that outstanding musicians usually started two or three years earlier than ordinary performers, often because their parents had recognized their ability. These musicians then needed at least ten years’ hard work and training in order to reach the level they were capable of attaining. People who want to have very gifted children are given the following advice: Marry an intelligent person. Allow children to follow their own interests rather than the interests of the parents. Start a child’s education early but avoid pushing the child too hard. Encourage children to play; for example, playing with musical instrument is essential for a child who wants to become an outstanding musician.

Question 46: Scientists chose twins for their study because_______.         

Có đội bóng thi đấu theo thể thức vòng tròn một lượt, thắng được điểm, hòa điểm, thua điểm. Kết thúc giải đấu, tổng cộng số điểm của tất cả đội là . Hỏi có bao nhiêu trận hòa ?

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions:

Who talk more – men or women? Most people believe that women talk more. However, linguist Deborah Tannen, who has studied the communication style of men and women , says that this is a stereotype . According to Tannen, women are more verbal – talk more – in private situations , where they use conversation as the “glue” to hold relationships together. But, she says, men talk more in public situations, where they use conversation to exchange information and gain status. Tannen points out that we can see these differences even in children. Little girls often play with one “best friend”, their play includes a lot of conversation. Little boys often play games in groups; their play usually involves more doing than talking. In school, girls are often better at verbal skills, boys are often better at mathematics.         

A recent study at Emory University helps to shed light on the roots of this difference. Researchers studied conversation between children age 3-6 and their parents. They found evidence that parents talk very differently to their son than they do to their daughters. The startling conclusion was that parents use more language with their girls. Specifically, when parents talk with their daughters , they use more descriptive language and more details. There is also far more talk about emotions, especially sadness, with daughters than with sons.  

Question: Which of the following statements can be inferred from the second paragraph?  

Có bao nhiêu cách chọn hai học sinh từ một nhóm gồm  học sinh.  

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions:

Who talk more – men or women? Most people believe that women talk more. However, linguist Deborah Tannen, who has studied the communication style of men and women , says that this is a stereotype . According to Tannen, women are more verbal – talk more – in private situations , where they use conversation as the “glue” to hold relationships together. But, she says, men talk more in public situations, where they use conversation to exchange information and gain status. Tannen points out that we can see these differences even in children. Little girls often play with one “best friend”, their play includes a lot of conversation. Little boys often play games in groups; their play usually involves more doing than talking. In school, girls are often better at verbal skills, boys are often better at mathematics.         

A recent study at Emory University helps to shed light on the roots of this difference. Researchers studied conversation between children age 3-6 and their parents. They found evidence that parents talk very differently to their son than they do to their daughters. The startling conclusion was that parents use more language with their girls. Specifically, when parents talk with their daughters , they use more descriptive language and more details. There is also far more talk about emotions, especially sadness, with daughters than with sons.  

Question: Which of the following phrases best explains the meaning of the word "verbal"?         

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions:

Who talk more – men or women? Most people believe that women talk more. However, linguist Deborah Tannen, who has studied the communication style of men and women , says that this is a stereotype . According to Tannen, women are more verbal – talk more – in private situations , where they use conversation as the “glue” to hold relationships together. But, she says, men talk more in public situations, where they use conversation to exchange information and gain status. Tannen points out that we can see these differences even in children. Little girls often play with one “best friend”, their play includes a lot of conversation. Little boys often play games in groups; their play usually involves more doing than talking. In school, girls are often better at verbal skills, boys are often better at mathematics.         

A recent study at Emory University helps to shed light on the roots of this difference. Researchers studied conversation between children age 3-6 and their parents. They found evidence that parents talk very differently to their son than they do to their daughters. The startling conclusion was that parents use more language with their girls. Specifically, when parents talk with their daughters , they use more descriptive language and more details. There is also far more talk about emotions, especially sadness, with daughters than with sons.  

Question: The word "they" in line 3 refers to____.