Phân xưởng A có 84 người, mỗi người dệt được 144 cái áo. Phân xưởng B có 112 người và dệt được số áo bằng số áo phân xưởng A. Hỏi mỗi người ở phân xưởng B dệt được bao nhiêu cái áo?

Một vật dao động điều hòa với phương trình gia tốc: a = 2cos(2πt + 5π/6)m/s2. Lấy π2≈ 10. Tại t = 0 vật có vận tốc: (gấp lắm mng ơi) A. -250 cm/s B.5π cm/s C. 250 cm/s D.-5π cm/s

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Mark the letter A, B, C, or D on your answer sheet to indicate the word that is closest in meaning to the underlined part in each of the following questions. Question 1. My original statement has been completely distorted by the media. A. wrong B. evil C. deform D. harm Question 2. With a wonderful memory for detail, this woman—who my father said never forgets anything—became truly loquacious. A. talkative B. thirsty C. beautiful D. complicated Mark the letter A, B, C, or D on your answer sheet to indicate the word that is opposite in meaning to the underlined part in each of the following questions. Question 3. Her imagination was kindled by the exciting stories her grandmother told her. A. smother B. detest C. enemy D. discourage Question 4. It was not for his friend to abate that confidence. A. free B. augment C. provoke D. wane Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the rest in the position of the main stress in each of the following questions. Question 5. A. tendency B. difference C. importance D. incidence Question 6. A. diverse B. current C. justice D. series Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction Question 7. It is believed that in the near future robots will be used to doing things such as cooking. A B C D Question 8. John announced that he could not longer tolerate the conditions of the contract under which A B C D he was working. Question 9. After driving for twenty miles, he suddenly realised that he has been driving in the wrong A B C D direction. 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 from 10 to 14. Telecommuting is some form of computer communication between employees’ homes and offices. For employees whose job 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 Week 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 supervising 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 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 homes is set aside as a work area, they never really get away from the office. Question 10. With which of the following topics is the passage primarily concerned? A. The advantages of telecommuting. B. A definition of telecommuting. C. An overview of telecommuting. D. The failure of telecommuting. Question 11. The phrase “of no consequence” means _____. A. of no use B. of no good C. unimportant D. irrelevant Question 12. The author mentions all of the following as concerns of telecommuting, EXCEPT _____. A. the opportunities for advancement. B. the different system of supervision. C. the lack of interaction with a group. D. The work place is in the home. Question 13. The reason why telecommuting has not become popular is that the employees _____. A. need regular interaction with their families. B. are worried about the promotion if they are not seen at the office. C. feel that a work area in their home is away from the office. D. are ignorant of telecommuting. Question 14. When Business Week published “The Portable Executive”, it implied that _____. A. systems for managing telecommuters were not effective. B. there was resistance on the part of many managers about telecommuting. C. the trend for telecommuting was optimistic. D. most telecommuters were satisfied with their work.

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bài 1:ptdt thành nhân tứ:x^2+8x-y^2-1

. Cho M = {a; b; c}. Hãy viết tất cả các tập hợp con của M gồm: a, 1 phần tử b, 2 phần tử c, 3 phần tử

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