Cho :         

(1): chọn tổ hợp gen mong muốn

(2): tạo các dòng thuần khác nhau

(3): tạo các giống thuần bằng cách cho tự thụ hoặc giao phối gần

(4): lai các dòng thuần khác nhau

Trình tự các bước trong quá trình tạo giống thuần dựa trên nguồn biến dị tổ hợp :    

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 that follow.

BASKETBALL

Although he created the game of basketball at the YMCA in Springfield, Massachusetts, Dr. James A. Naismith was a Canadian. Working as a physical education instructor at the International YMCA, now Springfield College, Dr. Naismith noticed a lack of interest in exercise among students during the wintertime. The new England winters were fierce, and the students balked at participating in outdoor activities. Naismith determined a fast-moving game that could be played indoors would fill a void after the baseball and football seasons had ended. First, he attempted to adapt outdoor games such as soccer and rugby to indoor play, but he soon found them unsuitable for confined areas. Finally, he determined that he would have to invent a game. In December of 1891, Dr. Naismith hung two old peach baskets at either end of the gymnasium at the school, and, using a soccer ball and nine players on each side, organized the first basketball game. The early rules allowed three points for each basket and made running with the ball violation. Every time a goal was made, someone had to climb a ladder to retrieve the ball. Nevertheless, the game became popular. In less than a year, basketball was being played in both the United States and Canada. Five years later, a championship tournament was staged in New York City, which was won by the Brooklyn Central YMCA. The teams had already been reduced to seven players, and five became standard in 1897 season. When basketball was introduced as a demonstration sport in the 1904 Olympic Games in St. Luis, it quickly spread throughout the world. In 1906, a metal hoop was used for the first time to replace the basket, but the name basketball has remained.  

Question: What does this passage mainly discuss?             

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 that follow.

BASKETBALL

Although he created the game of basketball at the YMCA in Springfield, Massachusetts, Dr. James A. Naismith was a Canadian. Working as a physical education instructor at the International YMCA, now Springfield College, Dr. Naismith noticed a lack of interest in exercise among students during the wintertime. The new England winters were fierce, and the students balked at participating in outdoor activities. Naismith determined a fast-moving game that could be played indoors would fill a void after the baseball and football seasons had ended. First, he attempted to adapt outdoor games such as soccer and rugby to indoor play, but he soon found them unsuitable for confined areas. Finally, he determined that he would have to invent a game. In December of 1891, Dr. Naismith hung two old peach baskets at either end of the gymnasium at the school, and, using a soccer ball and nine players on each side, organized the first basketball game. The early rules allowed three points for each basket and made running with the ball violation. Every time a goal was made, someone had to climb a ladder to retrieve the ball. Nevertheless, the game became popular. In less than a year, basketball was being played in both the United States and Canada. Five years later, a championship tournament was staged in New York City, which was won by the Brooklyn Central YMCA. The teams had already been reduced to seven players, and five became standard in 1897 season. When basketball was introduced as a demonstration sport in the 1904 Olympic Games in St. Luis, it quickly spread throughout the world. In 1906, a metal hoop was used for the first time to replace the basket, but the name basketball has remained.  

Question: Why did Naismith decide to invent basketball?             

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 that follow.

BASKETBALL

Although he created the game of basketball at the YMCA in Springfield, Massachusetts, Dr. James A. Naismith was a Canadian. Working as a physical education instructor at the International YMCA, now Springfield College, Dr. Naismith noticed a lack of interest in exercise among students during the wintertime. The new England winters were fierce, and the students balked at participating in outdoor activities. Naismith determined a fast-moving game that could be played indoors would fill a void after the baseball and football seasons had ended. First, he attempted to adapt outdoor games such as soccer and rugby to indoor play, but he soon found them unsuitable for confined areas. Finally, he determined that he would have to invent a game. In December of 1891, Dr. Naismith hung two old peach baskets at either end of the gymnasium at the school, and, using a soccer ball and nine players on each side, organized the first basketball game. The early rules allowed three points for each basket and made running with the ball violation. Every time a goal was made, someone had to climb a ladder to retrieve the ball. Nevertheless, the game became popular. In less than a year, basketball was being played in both the United States and Canada. Five years later, a championship tournament was staged in New York City, which was won by the Brooklyn Central YMCA. The teams had already been reduced to seven players, and five became standard in 1897 season. When basketball was introduced as a demonstration sport in the 1904 Olympic Games in St. Luis, it quickly spread throughout the world. In 1906, a metal hoop was used for the first time to replace the basket, but the name basketball has remained.  

Question: Soccer and rugby are the examples of ________.         

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 that follow.

BASKETBALL

Although he created the game of basketball at the YMCA in Springfield, Massachusetts, Dr. James A. Naismith was a Canadian. Working as a physical education instructor at the International YMCA, now Springfield College, Dr. Naismith noticed a lack of interest in exercise among students during the wintertime. The new England winters were fierce, and the students balked at participating in outdoor activities. Naismith determined a fast-moving game that could be played indoors would fill a void after the baseball and football seasons had ended. First, he attempted to adapt outdoor games such as soccer and rugby to indoor play, but he soon found them unsuitable for confined areas. Finally, he determined that he would have to invent a game. In December of 1891, Dr. Naismith hung two old peach baskets at either end of the gymnasium at the school, and, using a soccer ball and nine players on each side, organized the first basketball game. The early rules allowed three points for each basket and made running with the ball violation. Every time a goal was made, someone had to climb a ladder to retrieve the ball. Nevertheless, the game became popular. In less than a year, basketball was being played in both the United States and Canada. Five years later, a championship tournament was staged in New York City, which was won by the Brooklyn Central YMCA. The teams had already been reduced to seven players, and five became standard in 1897 season. When basketball was introduced as a demonstration sport in the 1904 Olympic Games in St. Luis, it quickly spread throughout the world. In 1906, a metal hoop was used for the first time to replace the basket, but the name basketball has remained.  

Question: The word "staged" in paragraph 4 is closest in meaning to________.         

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 that follow.

BASKETBALL

Although he created the game of basketball at the YMCA in Springfield, Massachusetts, Dr. James A. Naismith was a Canadian. Working as a physical education instructor at the International YMCA, now Springfield College, Dr. Naismith noticed a lack of interest in exercise among students during the wintertime. The new England winters were fierce, and the students balked at participating in outdoor activities. Naismith determined a fast-moving game that could be played indoors would fill a void after the baseball and football seasons had ended. First, he attempted to adapt outdoor games such as soccer and rugby to indoor play, but he soon found them unsuitable for confined areas. Finally, he determined that he would have to invent a game. In December of 1891, Dr. Naismith hung two old peach baskets at either end of the gymnasium at the school, and, using a soccer ball and nine players on each side, organized the first basketball game. The early rules allowed three points for each basket and made running with the ball violation. Every time a goal was made, someone had to climb a ladder to retrieve the ball. Nevertheless, the game became popular. In less than a year, basketball was being played in both the United States and Canada. Five years later, a championship tournament was staged in New York City, which was won by the Brooklyn Central YMCA. The teams had already been reduced to seven players, and five became standard in 1897 season. When basketball was introduced as a demonstration sport in the 1904 Olympic Games in St. Luis, it quickly spread throughout the world. In 1906, a metal hoop was used for the first time to replace the basket, but the name basketball has remained.  

Question: The author mentions all of the following as typical of the early game of basketball EXCEPT__________.         

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 that follow.

BASKETBALL

Although he created the game of basketball at the YMCA in Springfield, Massachusetts, Dr. James A. Naismith was a Canadian. Working as a physical education instructor at the International YMCA, now Springfield College, Dr. Naismith noticed a lack of interest in exercise among students during the wintertime. The new England winters were fierce, and the students balked at participating in outdoor activities. Naismith determined a fast-moving game that could be played indoors would fill a void after the baseball and football seasons had ended. First, he attempted to adapt outdoor games such as soccer and rugby to indoor play, but he soon found them unsuitable for confined areas. Finally, he determined that he would have to invent a game. In December of 1891, Dr. Naismith hung two old peach baskets at either end of the gymnasium at the school, and, using a soccer ball and nine players on each side, organized the first basketball game. The early rules allowed three points for each basket and made running with the ball violation. Every time a goal was made, someone had to climb a ladder to retrieve the ball. Nevertheless, the game became popular. In less than a year, basketball was being played in both the United States and Canada. Five years later, a championship tournament was staged in New York City, which was won by the Brooklyn Central YMCA. The teams had already been reduced to seven players, and five became standard in 1897 season. When basketball was introduced as a demonstration sport in the 1904 Olympic Games in St. Luis, it quickly spread throughout the world. In 1906, a metal hoop was used for the first time to replace the basket, but the name basketball has remained.  

Question: Which sentence is TRUE about the basketball game, according to the reading passage?         

Read the text carefully and then choose the correct answer (A, B, C or D) for each sentence  

If you are invited to someone’s house in America for dinner, you should bring a gift, such as a bunch of flowers or a box of chocolates. If you give your host a wrapped gift, he/she may open it in front of you. Opening a gift in front of the gift-giver is considered polite. It shows that the host is excited about receiving the gift and wants to show his/her appreciation to you immediately. Even if the host doesn’t like it, he/she will tell “a white lie” and say how much they like the gift to prevent the guest from feeling bad. If your host asks you to arrive at the particular time, you should not arrive exactly on time or earlier than expected time, because this is considered to be inconvenient and therefore rude, as the host may not be ready.

Question: In America, if you are invited for dinner, you should bring ________ as a gift.         

Read the text carefully and then choose the correct answer (A, B, C or D) for each sentence  

If you are invited to someone’s house in America for dinner, you should bring a gift, such as a bunch of flowers or a box of chocolates. If you give your host a wrapped gift, he/she may open it in front of you. Opening a gift in front of the gift-giver is considered polite. It shows that the host is excited about receiving the gift and wants to show his/her appreciation to you immediately. Even if the host doesn’t like it, he/she will tell “a white lie” and say how much they like the gift to prevent the guest from feeling bad. If your host asks you to arrive at the particular time, you should not arrive exactly on time or earlier than expected time, because this is considered to be inconvenient and therefore rude, as the host may not be ready.

Question: Opening a gift in front of the gift-giver is considered __________.         

Read the text carefully and then choose the correct answer (A, B, C or D) for each sentence  

If you are invited to someone’s house in America for dinner, you should bring a gift, such as a bunch of flowers or a box of chocolates. If you give your host a wrapped gift, he/she may open it in front of you. Opening a gift in front of the gift-giver is considered polite. It shows that the host is excited about receiving the gift and wants to show his/her appreciation to you immediately. Even if the host doesn’t like it, he/she will tell “a white lie” and say how much they like the gift to prevent the guest from feeling bad. If your host asks you to arrive at the particular time, you should not arrive exactly on time or earlier than expected time, because this is considered to be inconvenient and therefore rude, as the host may not be ready.

Question: Why does the host open the gift in front of you ?             

Read the text carefully and then choose the correct answer (A, B, C or D) for each sentence  

If you are invited to someone’s house in America for dinner, you should bring a gift, such as a bunch of flowers or a box of chocolates. If you give your host a wrapped gift, he/she may open it in front of you. Opening a gift in front of the gift-giver is considered polite. It shows that the host is excited about receiving the gift and wants to show his/her appreciation to you immediately. Even if the host doesn’t like it, he/she will tell “a white lie” and say how much they like the gift to prevent the guest from feeling bad. If your host asks you to arrive at the particular time, you should not arrive exactly on time or earlier than expected time, because this is considered to be inconvenient and therefore rude, as the host may not be ready.  

Question: When invited for dinner, you shouldn’t arrive exactly on time because ______.