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lenhat2109loga2021
2 năm trước
Bài 2: Viết công thức tính công cơ học? Nêu ý nghĩa và đơn vị các đại lượng trong công thức? Bài 3: Một máy bay trực thăng khi cất cánh, động cơ tạo ra một lực phát động là F =10500N, sau thời gian t = 90 giây máy bay đạt được độ cao là h = 850 m. Tính công của động cơ máy bay trong thời gian cất cánh? Bài 4: Dưới tác dụng của chân người gây ra một lực F = 4000N làm cho chiếc xe chuyển động đều lên dốc với vận tốc 5m/s trong 10 phút. a. Tính công thực hiện được khi xe đi từ chân dốc lên đỉnh dốc?
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VII.Read the passage and choose the correct answers. Central City Middle School is one of the most Pretigious schools in the city. There are 20 classes which include 6th grade, 7th grade, 8th grade, 9th grade. Each class only has at most 20 students to make sure that each student receives the attention they need. Classrooms at Central City Middle School are equipment to enhance students’ learning experience. On campus, there is a gym, a football field, a science lab......Hundreds of books covering different topics are availble for students in the schools library. Even though the tutions fees are extremly high, thousands of students want to enroll at Central City Middle School every year. 39.Which of the following would be the best tittle of the passage? A.Students of Central City Middle School. B.Tuition Fees of Central City Middle School. C.Prestigious Central City Middle School. D. Middle Schools in Central City. 40.What is the meaning of the word “Prestigious” underlined in the passage? A. Not dangerous. B.Can be bought. C.Worth a lot of money. D.Having high status. 41.How many students does Central City Middle School have at most? A.About 400 students. B. About 200 students. C. About 40 students. D. About 20 students. 42.Which of the following is FALSE about Central City Middle School? A.There are 4 grade in Central City Middle School. B.Each grade in Central City Middle School has 20 classes. C. Central City Middle School allows only 20 students in one class. D. Central City Middle School’s facilities are decribed with its classrooms, campus and library. 43. Which of the following is NOT mentioned in the passage? A. The school cares about its students by limiting the number of students in one class. B. The library has hundreds of books with diverse topics. C.The school organises sports competition for students each year. D.The extremely high tution fees can not stop thousands of students from applying to this school.

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