Mệnh đề không đúng là:         

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Một số câu hỏi khác có thể bạn quan tâm.

• Gọi  là hai điểm cực trị của hàm số  Tính giá trị của biểu thức         

• Một sóng ngang có biên độ 8cm, bước sóng 30cm. Tại thời điểm t hai điểm M, N trên một phương truyền sóng cùng có li độ bằng 4cm và chuyển động ngược chiều nhau, giữa M và N có 4 điểm đang có li độ bằng 0. Xác định khoảng cách lớn nhất của MN?
  

• I feel as if my head ________ now.

• Read the passage and choose the correct answer:
  Telecommuting is some form of computer communication between employees' homes and offices. For employees whose jobs involve sitting at a terminal or word processor entering data or typing reports, the location of the computer is of no consequence. If the machine can communicate over telephone lines, when the work is completed, employees can dial the office computer and transmit the material to their employers. A recent survey in USA Today estimates that there are approximately 8. 7 million telecommuters. But although the numbers are rising annually, the trend does not appear to be as significant as predicted when Business Wee, published "The Portable Executive" as its cover story a few years ago. Why hasn't telecommuting become more popular?
  Clearly, change simply takes time. But in addition, there has been active resistance on the part of many managers. These executives claim that superrising the telecommuters in a large work force scattered across the country would be too difficult, or at least, systems for managing them are not yet developed, thereby complicating the manager's responsibilities.
  It is also true that employees who are given the option of telecommuting are often reluctant to accept the opportunity. Most people feel that they need regular interaction with a group, and many are concerned that they will not have the same consideration for advancement if they are not more visible in the office setting. Some people feel that even when a space in their home is set aside as work area, they never really get away from the office.
  Question. It can be inferred from the passage that the author is
  
• Nhân nghĩa thể hiện ở suy nghĩ, tình cảm và hành động cao đẹp của
  
• Read the passage and choose the correct answer:
  Galileo Galilei, one of the first modern scientists, was born in Pisa, Italy, in 1564. About twenty years later he attended the University of Pisa. At first he studied philosophy, but later he studied mathematics and astronomy. He was interested in the way the earth and other planets move around the sun. He made the telescope, which made far-away things look larger and easier to examine. He also started the new way of working in science. Before Galileo; scientists did not do experiments. They just guessed about how something happened. Galileo was different. He did not just make guesses. He did experiments and watched to see what happened.
  Galileo was famous for his study of how things fall. He was the first person to do experiments about this problem. Before, people thought that heavy things always fell faster than light things. He found out that this was not true. He took a heavy ball and a light ball and he dropped them both from a high place. They fell at the same speed. This meant that weight is not important. This is the law of failing bodies. It is an important law for understanding our world.
  The life of the scientist was not always easy in the 1500s. For example, Galileo got into trouble because of his scientific ideas. His ideas were not the same as the religious ideas at the time. Many religious people did not agree with him. During his whole life he had to worry about this. He even went to prison for a while. But no one could stop him from thinking: He continued to look for scientific answers to his questions about the world.
  Question. Galileo Galilei studied all of the following EXCEPT. . . . . . . . . . . .
  

• Có mười cái ghế(mỗi ghế chỉ ngồi được một người) được xếp trên một hàng ngang. Xếp ngẫu nhiên học sinh ngồi vào, mỗi học sinh ngồi đúng một ghế. Tính xác suất sao cho không có hai ghế trống nào kề nhau.  

• Gọi là nghiệm dương nhỏ nhất của Mệnh đề nào sau đây là đúng?                                 

• If only I ________ that you wanted to invest money in business.

• Nhân nghĩa là lòng thương người và đối xử với người