user-avatar
Diemai0603
2 năm trước
nào? Câu 3.Trong các sự truyền nhiệt dưới đây, sự truyền nhiệt nào không phải là bức xạ nhiệt ? a. Sự truyền nhiệt từ dây tóc bóng đèn điện đang sáng ra không gian bên trong bóng đèn. b. Sự truyền nhiệt từ đầu bị nung nóng sang đầu không bị nung nóng của một thanh đồng. c. Sự truyền nhiệt tử mặt trời xuống trái đất d. Sự truyền nhiệt từ bếp lò tới người đứng gần bếp. Câu 4. Tại sao nổi xoong làm bằng kim loại còn bát đĩa thì làm bằng sử? Câu 5. Những vật có khả năng hấp thụ bức xạ nhiệt tốt là những vật như thể nào? Tại sao mùa hè thường mặc áo màu sáng, mùa đông thường mặc áo màu tối? Câu 6. Tại sao khi đun nước ta phải đun ở phía dưới đáy ấm? Câu 7. Tại sao về mùa đông mặc nhiều áo mỏng ấm hơn một áo dày ?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

: 00:51:58 : 4 / 40 Ôn tập THCS - Môn Tiếng Anh 9 - Đề số 6 Mã đề thi: 745-2927 Số câu hỏi: 40 Câu hỏi 1 Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. The picture reminds him of the time______ he studied in New York. A: which B: when C: where D: why 2 Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. If there ______ so many new words, it would be easier to master English. A: aren’t B: are C: were D: weren’t 3 Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. My father had gone home before we arrived. A: After my father arrived, we went home. B: After my father had gone home, we had arrived. C: After my father had gone home, we arrive. D: After my father had gone home, we arrived. 4 Mark the letter A, B, C or D to indicate the most suitable response to complete each of the following exchanges. “Let’s have some coffee.” - “______” A: Yes, spot on! B: I’d love to but I may be awake at night. C: Sorry. D: Once in a blue moon. 5 Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. The children couldn"t go swimming because the sea was too rough. A: The children couldn’t go swimming because of the rough sea. B: The children couldn’t go swimming because of the sea rough C: The children couldn’t go swim because of the rough sea. D: The children couldn’t go swimming due of the rough sea.

V. Complete the sentences with the correct words in the box. goggles; racket; skateboard; skis; ring; paddle; runningshoes; gloves 1. All we need to run is good _______________. 2. They fight in a square area with ropes around it, called a boxing _______________. 3. _______________ are special glasses that fit closely to the face to protect the eyes from wind, dust, water, etc. 4. In boxing, the fighters wear large leather boxing _______________ on their hands. 5. Shall we play table tennis? - Great! Can you lend me a _______________? 6. He threw his tennis _______________ across the court in anger. 7. When we put _______________ on we can move over snow easily. 8. He sometimes rides his _______________ to school. VI. Complete the sentences with the correct tense of the verbs play, do or go. 1. Sarah ______________ gymnastics on Saturday evenings. 2. Mark ______________ badminton with his friends at the moment. 3. My friends and I ______________ climbing yesterday. 4. _________ you __________ table tennis last Sunday? 5. Jim ______________ basketball because he wasn’t tall enough. 6. We ______________ sports together when we were kids. 7. People often ______________ jogging in the park. 8. I ______________ judo now and I love it! VII. Fill in each blank with the simple pasttense of the verb from the box. play; go;do; buy; teach; lose; score; win; become; enjoy 1. My friends and I __________ swimming yesterday morning. 2. We really __________ the game last Sunday. 3. In 1958, at the age of 17, Pelé__________ his first World Cup. 4. The Canadian hockey team __________ six goals against Switzerland. 5. The home team __________ very well, but they lost the match. 6. My father __________ me how to ride a bike. 7. I __________ a new baseball cap last week. 8. At the age of 17, Messi __________ the youngest official player and goal scorer inthe Spanish La Liga. 9. She has a black belt in karate. She first __________ karate when she was seven. 10. Argentina __________ 1 - 0 to Germany in the final. VIII. Fill in the sentences with the correct form (past simple) of the verbs in brackets. 1. I ____________ (see) the film last night but I ____________ (not like) it. 2. ____________ (Marco/ win) the golf competition? 3. They ____________ (not play) very well yesterday. They ____________ (lose) the match. 4. How many goals _________________ (your team/ score) in the first half? 5. I ____________ (be) very tired, so I ____________ (go) to bed early last night. 6. ____________ (you/ go) swimming this morning? 7. The children ____________, (not be) hungry, so they ____________ (not eat) anything. 8. Susan and her friends ____________ (come) to Japan three months ago. 9. I ____________ (have) a wonderful holiday with my family last July. 10. Jane ________ (not be) at the party last Sunday, so she ________ (not know)what happened.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team