Đáp án:
vì dùng tay tác dụng ơ vị trí bản lề thì cánh tay đòn sẽ lớn nên mình chỉ cần dùng lực nhỏ để mở cửa. vì vậy việc mở cửa dễ dàng hơn
Xem hệ là đòn bẩy với điểm tựa tại bản lề
Khi tay cầm càng xa bản lề thì cánh tay đòn càng lớn
⇒ Lực tác dụng sẽ nhỏ hơn
Giúp mk vs mn ơi mk sẽ vote 5 sao và 1 lời cảm ơn
Vì sao hệ sinh thái có lưới thức ăn càng phức tạp thì sự ổn định và khả năng điều chỉnh hệ sinh thái còn cao?
20 Choose the word whose underlined part is pronounced differently from the others. A: pleasure B: bread C: measure D: untreated 21 Choose the underlined part A, B, C or D that needs correcting. Picture 11 A: A B: B C: C D: D 22 Choose the underlined part A, B, C or D that needs correcting. Picture 10 A: A B: B C: C D: D 23 Choose the word whose stressed pattern is pronounced differently from the others. A: litter B: affect C: pollute D: effect 24 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. The Earth Day comes from the idea of a former US politician Gaylord Nelson. He was worried about the world pollution, and the health of plants and animals. In 1969, he decided that the world should have a special day to teach people about how to make environment better. His idea became popular and on 22 April 1970 the first Earth Day was celebrated. Since then, environmentalists have used the day to educate people about their roles in protecting our planet. Earth Day finally became a global celebration around the world. On this day, people come together to talk about global warming, protecting rare animals and saving energy sources. Question 21: The best title for the passage can be ______. A: The celebration of Earth Day B: The meaning of the Earth Day C: Gaylord Nelson, the politician D: Preserving our energy sources 25 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. The Earth Day comes from the idea of a former US politician Gaylord Nelson. He was worried about the world pollution, and the health of plants and animals. In 1969, he decided that the world should have a special day to teach people about how to make environment better. His idea became popular and on 22 April 1970 the first Earth Day was celebrated. Since then, environmentalists have used the day to educate people about their roles in protecting our planet. Earth Day finally became a global celebration around the world. On this day, people come together to talk about global warming, protecting rare animals and saving energy sources. Question 20: Environmentalists have used the Earth Day to ________. A: carry their research B: educate people about their roles of protecting our planet C: ban people from using energy sources D: get people around the world to play together
Mình cần gấp các làm đc cầu nào thì làm
E đang cần gấp câu trả lời ai trả lời chính xác e cộng thêm điểm mong achi giúp e với huhu !!!
Giúp e phần d câu 11,13 và phần c câu 12 với ạ. Cảm ơn m.n nhiều
Một trong những tình cảm thiêng liêng luôn thường trực trong mỗi con người Việt Nam là tình yêu Tổ quốc. Đặc biệt, tình cảm đó đã được nhiều nhà thơ, nhà văn thể hiện trong tác phẩm của mình. Trong bài thơ “Tình sông núi”, nhà thơ Trần Mai Ninh viết: “Có mối tình nào hơn thế nữa Nói bằng súng, bằng gươm sáng rền Có mối tình nào hơn thế nữa Trộn hoà lao động với giang sơn Có mối tình nào hơn Tổ quốc?” Dựa vào ý thơ trên và các bài thơ hiện đại đã được học ở chương trình Ngữ văn lớp 9 – tập 1, em hãy viết một bài văn với nhan đề: “Tình yêu Tổ quốc”. VIẾT GIÚP MÌNH MỞ BÀI VỚI KẾT BÀI VỚI.MÌNH ĐANG CẦN GẤP. MÌNH CẢM ƠN NHIỀU
12 Choose the best answer A, B, C or D to complete the sentence. Question 10: Too much use of electric lights in cities may cause ___________ pollution. A: light B: thermal C: visual D: water 13 Choose the word whose underlined part is pronounced differently from the others. A: dust B: earplug C: dump D: pollution 14 Mark the letter A, B, C or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) to each of the following questions. Question 15: Many fish in the lake near my house have died because of the polluted water. A: treated B: pure C: drinkable D: contaminated 15 Choose the best answer A, B, C or D to complete the sentence. Question 12: The polluted water__________ in the death of the fish. A: makes B: causes C: results D: leads 16 Choose the best answer A, B, C or D to complete the sentence. Question 7: I think the waste from the factory has ___________ the lake. A: polluted B: damage C: damaged D: pollution 17 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. The Earth Day comes from the idea of a former US politician Gaylord Nelson. He was worried about the world pollution, and the health of plants and animals. In 1969, he decided that the world should have a special day to teach people about how to make environment better. His idea became popular and on 22 April 1970 the first Earth Day was celebrated. Since then, environmentalists have used the day to educate people about their roles in protecting our planet. Earth Day finally became a global celebration around the world. On this day, people come together to talk about global warming, protecting rare animals and saving energy sources. Question 17: The Earth Day was first celebrated in ______. A: 1969 B: 1970 C: 2015 D: before 1969 18 Choose the best answer A, B, C or D to complete the sentence. Question 11: ___________ there was a lot of acid rain, many botanical species died last year. A: Since B: So C: But D: Although 19 Choose the sentence A, B, C or D that is closest in meaning to the given sentence. Question 23: The street doesn’t look attractive because people throw rubbish in the street. A: If people didn’t throw rubbish in the street, it would look attractive. B: If people don’t throw rubbish in the street, it will look attractive C: If people didn’t throw rubbish in the street, it will look attractive. D: If people threw rubbish in the street, it would look attractive.
Viết các hệ thức về cạnh và đường cao trong tam giác vuông
Bài 2: Tính nhanh: d) 66.25 + 5.66 + 66.14 + 33.66 g) 27.121 – 87.27 + 73.34 h) 125.98 – 125.46 – 52.25
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến