Đáp án:
Cách đo thể tích của một hòn bị sắt bằng bình chia độ
+ Xác định thể tích chất lỏng ban đầu trong bình chia độ
+ Thả bi chìm vào trong chất lỏng, mực chất lỏng dâng lên, thể tích vật và chất lỏng là V'
+ Thể tích bi: V'-V
Đổ nước vào BCĐ , xác định thể tích nước là $V_{1}$
Thả hòn bi sắt vào BCĐ , xác định thể tích nước là $V_{2}$
Lấy $V_{2}$ - $V_{1}$ = $V_{hòn bi sắt }$
@ara boss ris
On tập HKI Lop 7 c. Where can students play at recess? d. What do students have to wear at school? II- Read the passage then answer the questions below (2,5p). Hoang goes to Quang Trung school. He is in class 7A and he enjoys school very muck favorite subject is Electronics. In this class, he learns to repair household appliances. Now Hos can help his mother and father at home. He can fix the lights, the washing machine and th refrigerator. He is good at fixing things. 1. Which subject does Hoang like best? 2. Does Hoang like other subjects at school? 3. What does he learn to do in Electronics? 4. How does this subject help Ba? 5. Is Hoang good at fixing things? II/ Read carefully the passage below then choose one the most correct answer : It's a quarter past five. The students of the school of Le Loi come out of their classrooms. Many of them go home. Some sit in the cafeteria and wait for their parents. he students join many different after-school activities. Some students stay at school and play ports. They change their clothes and play soccer or table tennis. Now and then they go swimming. Hot all after-school activities are sports.There is a music and drama society. Members of this group ractice playing musical instruments or rehearse for a play.Others try to help the community. They arn how to do first aids. They all enjoy working together. ....... the students go home after school. a. All b. A lot of c. Some d. Any Some of the students wait in the .... a. classroom b. cafeteria ... collect some children a. The teacher A few sporty students..... go swimming. a. sometimes b. usually ... of the after- school activities are sports. c. community d. school b. Friends c. Mothers d. Sisters c. always d. never a. All Read the passage carefully. name is Hoa. My family has six people: my grandfathers, my parents, my elder brother and I. grandparents are over seventy years old. They often take care of the plants and flowers in the len in their free time. My father is a teacher. He teaches English at a high school in the city er. My mother is a nurse. She works at a big hospital, and she takes care of sick people. My r brother is an engineer. He works in a factory making washinh machines. My brother and I a go to the movie theater on the weekend. b. Some c. None d. A lot Check T/ F There are six people in Hoa's family. Her parents often take care of the plants and flowers in the garden. . Her father works in a big hospital in the city center. Her mother is a nurse Her brother and Hoa often go to museum on the weekend. Her elder brother works in a school.
Làn giúp mỉnh với. Mình sẽ vote 5 sao và câu yar lời hay nhất
thế nào là soạn văn theo chuyên đề
Khi mổ giun đất sẽ thấy giũa thành cơ thể và thành ruột có 1 khoang trống chứa dịch là gì? Đặc điểm của ngành ruột khoang?
Cơ quan bài tiết của Tôm nằm ở đâu? Nhện bắt mồi theo kiểu nào? Nên diệt sâu bọ ở giai đoạn nào?
trai làm sạch môi trường như thế nào
yếu tố giúp tôm tạo màu phù hợp với môi trường là gì?
he did not leam his lesson : So it is difficult for him to understand the new leson -->if giúp mình vs
vẽ chữ bye 2020...ở lại nhé và một lời nhắn nhủ nào đó
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