user-avatar
trannhi27052001
2 năm trước
Câu 1: hãy nêu tên một dụng cụ dùng điện mà em biết và chỉ ra các bộ phận dẫn điện và các bộ phận cách điện trên dụng cụ đó. Câu 2: không khí có phải là môi trường cách điện không ? tại sao đứng gần dây điện có thể nguy hiểm mặc dù ta chưa chạm vào dây ?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

13. When I was young, I ………to be a singer. A-want B-was wanting C-wanted D-had wanted 14. They……..me about it last week. A-was telling B-told C-had told D-would tell 15. At last the bus came. We ………..for half an hour. A-waited B-was waiting C-have waited D-had been waiting 16. When the first child was born, they……..married for three years. A-have been married B-had been married C-will been married D-will have been married 17. Billy: “They are buying a villa near the sea.” Jane: “________” A. Oh no! B. How wonderful! C. Well done! D. That’s shocking! 18. Kate: “I have won the gold medal.” Laura: “_______” A. Oh no! B. How wonderful! C. Well done! D. That’s shocking! 19. Many people were injured and died in the storm. A. That’s a relief B. How wonderful! C. Well done! D. That’s awful!

Choose the correct answer 1. She _________ the ocean before she moved to Vancouver. A. had never seen B. never seen C. have never seen D. had never saw 2. The teacher ________ out when I arrived in the classroom. A. goes B. have gone C. has gone D. had gone 3. I ______ my document before the power went out in the computer lab. A. had save B. have saved C. had saved D. saved 4. When they arrived we _________ the test. A. had already started B. have already started C. starts D. already starting 5. George _________ his furniture before he moved to Japan. A. have sold B. had sold C. had sell D. sells 6. David uses English as his mother ……….. because he comes from the UK. A. tongue B. mouth C. nose D. cheek 7. The government of New Zealand has done a lot to ……….. the culture of the Maori. A. preserve B. surround C. puzzle D. pronounce 8. Before you asked, the letter………. A- was written B-had been written C-had written D-has been written 9. Almost everyone……for home by the time we arrived. A-leave B-left C-leaves D-had left 10. By the age of 25, he …….two famous novels. A- wrote B-writes C-has written D-had written 11. While her husband was in the army, Janet ……. to him twice a week. A-was writing B-wrote C-was written D-had written 12. I couldn’t cut the grass because the machine…….. a few days previously. A-broke down B-has been broken     C-had broken down D-breaks down 13. When I was young, I ………to be a singer. A-want B-was wanting C-wanted D-had wanted

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