c) Ba số lẻ liên tiếp :

51; 53; …

199; …; 203

…; 999; 1001.

b) Nêu giá trị của mỗi chữ số 3 trong mỗi số sau :

103 ; 1379 ; 8932 ; 13 064; 3 265 910.

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.

      Although management principles have been implemented since ancient times, most management scholars trace the beginning of modern management thought back to the early 1900s, beginning with the pioneering work of Frederick Taylor (1856-1915) Taylor was the first person to study work scientifically. He is most famous for introducing techniques of time and motion study, differential piece rate systems, and for systematically specializing the work of operating employees and managers. Along with other pioneers such as Frank and Lillian Gilbreth, Taylor set the stage, labeling his philosophy and methods “scientific management’. At that time, his philosophy, which was concerned with productivity, but which was often misinterpreted as promoting worker interests at the expense of management, was in marked contrast to the prevailing industrial norms of worker exploitation.

      The time and motion study concepts were popularized by Frank and Lillian Gilbreth. The Gilbreths had 12 children. By analyzing his children’s dishwashing and bedmaking chores, this pioneer efficiency expert, Frank Gilbreth, hit on principles whereby workers could eliminate waste motion. He was memorialized by two of his children in their 1949 book called “Cheaper by the Dozen”.

          The Gilbreth methods included using stop watches to time worker movements and special tools (cameras and special clocks) to monitor and study worker performance, and also involved identification of “therbligs” (Gilbreth spelled backwards) - basic motions used in production jobs. Many of these motions and accompanying times have been used to determine how long it should take a skilled worker to perform a given job. In this way an industrial engineer can get a handle on the approximate time it should take to produce a product or provide a service. However, use of work analysis in this way is unlikely to lead to useful results unless all five work dimensions are considered: physical, psychological, social, cultural, and power.

The word “ dimensions” in line 24 is closest in meaning to

A. sizes      

B. extents    

C. aspects    

D. standard

ô tô đang chuyển động với vận tốc 54km/h, gặp đoàn tàu đi ngược chiều. Người lái xe thấy đoàng tàu lướt qua mặt mình trong 3 giây. Biết vận tốc của tàu là 36km/h. a/ Tính chiều dài đoàn tàu b/ Nếu ô tô chuyển động theo đoàn tàu thì thời gian để ô tô vượt hết chiều dài đoàn tàu là bao nhiêu? Coi vận tốc tàu và ô tô ko thay đổi

Read the following passage and blacken the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks in the following question.

Cultural diversity can be such a cool thing. I grew up in a predominantly white private school, (62)________

teaching in a place that is extremely diverse has been a joy. I can stand in the hall and (63)________Spanish, Russian, Polish, Korean, Mandarin, Hindu, etc. the list can go on and on. What we need to be careful of is not to make (64)________a big deal out of cultural diversity. I think that when we place too much (65)________ on the diversity it can become a polarizing act. Many students are very aware (66)________their differences, and most just don’t care. I think that cultural diversity is something that needs (67)________addressed be teachers in the schools as something that is positive. Often in rural areas there is not a lot of cultural diversity. (68)________a result, when a student is from a different culture there is a question of what do I do to (69)________their learning needs. It is important before a teacher can teach diverse population they need to (70)________that they are also multicultural. In addition, how much of a role will these beliefs (71)________within the education on the child.

Question 70

A. recognize

B.do

C. observe

D. expect

Trọng lượng của 2 học sinh là:

P_A= 10.m_A= 10.35=350N

P_B= 10.mB = 10.30=300N

Gọi O là điểm tựa thì cánh tay đòn OA và OB của các trọng lực phải thõa mãn điều kiện cân bằng của đòn bẩy.

\(\dfrac{OA}{OB}=\dfrac{P_A}{P_B}=\dfrac{300}{350}=\dfrac{6}{7}\)=> \(OA=\dfrac{6}{7}OB\left(1\right)\)

Ngoài ra OA+OB=2,6 (2)

Từ (1)(2) ta có :

\(\dfrac{6}{7}OB+OB=2,6\) => OB=1,4m

=> OA=1,2m