Số hiệu nguyên tử của các nguyên tố trong bảng tuần hoàn bằng số proton và bằng số electron
Số hiệu nguyên tử của các nguyên tố trong bảng tuần hoàn = số p=số e =số thứ tự của ô nguyên tố đó
.- Hãy chỉ ra trạng ngữ trong đoạn văn sau và xác định ý nghĩa của trạng ngữ đó: Buổi chiều, xe dừng lại ở thị trấn nhỏ. Nắng phố huyện vàng hoe. Những em bé Hmông, những em bé Tú Dí, Phù Lá cổ đeo móng hổ, quần áo sặc sỡ đang chơi đùa trước của hàng. Hoàng hôn, áp phiên của phiên chợ thị trấn, người ngựa dập dìu chìm trong sương núi tím nhạt. Hôm sau chúng tôi đi Sa Pa .
29. It is my secret. You __________ tell anyone. A. needn’t B. mustn’t C. must D. need 34. mountain/ the / gorilla / on the verge/ is / of extinction A. Extinction of the mountain gorilla is on the verge B. On the verge the mountain gorilla is of extinction. C. The mountain gorilla of on the verge is extinction. D. The mountain gorilla is on the verge of extinction. 35. in / the / home/ are/ and / books / one of / wonderful sources / the/ of / knowledge / pleasure. A. The wonderful sources of knowledge and pleasure in the home are one of books. B. One of the wonderful sources of knowledge and pleasure are books in the home. C. In the home books are one of the wonderful source of knowledge and pleasure. D. Books in the home are one of the wonderful sources of knowledge and pleasure. IV. Error Identification Phần này trong hình V. Read the following passage and mark the letter A, B, C, or D Sue (41)__________ reading and often borrows books in the local library (42)________ is near her house. She goes to the library to change her books every evening. The library is open until 8 p.m. The library is (43)_________ to everybody in the town. No one has to pay to borrow books. But (44)_______ readers keep books for too long, they have to pay a fine. Sue's children have been encouraged to read books (45)_______ they were very young. They often change their books on Saturday morning. They all love reading. 41. A. will love B. is loving C. loves D. has loved 42. A. which B. when C. what D. where 43. A. freedom B. freely C. free D. freeing 44. A. whether B. if C. or D. so 45. A. while B. during C. for D. since
Đề :use the prompts to write sentences 1.We/go/skiing yesterday 2.you/watch/the men 's basketball final /TV/last night ? 3. I/not play / badminton/last Sunday/because/I/be/ill 4.Sue and her friends/do/yoga/the gym/now. 5.He/usually/play/football/his friends /Saturdays 6.Where /the/children /be/yesterday morning ? They/be/at the swimming pool 7.His father /teach/him/ how/play/football/ a very young age 8.Last week /we/study /how/surf.It /be/very interesting Lưu ý cấm spam !!!
Giúp mik với ạ Bài 3:Cho A={6,7,8,9};B={-1,-2,-3,4,8} a)Có bao nhiêu hiệu hạng a-b với aeA,beB b)Có bao nhiêu hiệu chia hết cho 5? c)Có bao nhiêu hiệu là số âm?
Cho phương trình x ²-4x+m=0 Tìm để pt có các nghiệm thỏa mãn x1<x2 và x1 ²-x2 ²=8 giúp với plsssssssssssssssssssssssssssss mod bđhh
tìm số tự nhiên n có 2 chữ số biết rằng 2n+1 và 3n+1 đều là số chính phường
Cho tam giác ABC cân tại A. Từ B kẻ đường vuông góc với AB và từ C kẻ đường vuông góc với AC. Hai đường này cắt nhau tại M. Chứng minh rằng a/AMB = AMC b/ AM là đường trung trực của đoạn thẳng BC.
I. Choose the word which is stressed differently from the rest: 1. A. disaster B. prisoner C. agency D. family 2. A. international B. federation C. society D. conservation II. Choose the- word whose underlined part is pronounced differently 3. A. gold B. region C. organize D. game. 4. A. punCH B. synCHronized C. MarCH D. touCHing 5. A. visited B. decided C. engaged D. disappointed III. Choose the Best Answer: 6. When a reader reads an interesting book slowly and carefully, he _________it A. swallows B. chews and digests C. tastes D. dips into 7.’’ Thank you for your nice gift.’’ “__________________________’’ A. But do you know how much it costs ? B. You‘re welcome. C. In fact. I myself don’t like it D. I’m glad you like it. 8. “Let’s go to the movie now,’’ Oh! ________________. A. Good idea! B. I don’t C. Why’s that? D. I need it. 9. The Red List is A special book that provides names of _________animals. A. hunted B. vulnerable and endangered C. endangered D. extinct 10. He is unreliable. What he says _______ be believed. A. cannot B. must not C. may not D. might not 11. The picnic ________ because Peter has just had a traffic accident. A. will cancel B. will be cancelling C. will be cancelled D. will have cancelled 12. We have plenty of time for doing the work. We _______ be hurried. A. need not B. should not C. must not D. may not 13. _____________ books are ones in which the story is told or illustrated with pictures. A. Comic B. Thriller C. Romantic D. Science 14. I have earned my own living ___________I was fifteen. A. while B. when C. since D. as soon as 15. A __________ is the one who can keep ball with both hands. A. defender B. midfielder C. attacker D. goalkeeper 16. Air tank, regulator, wet suit, mask, fins are equipments required to play in __________. A. water polo B. rowing C. wind surfing D. scuba diving 17. Life on Earth is disappearing fast and will continue to do so unless urgent action is taken. A. vanishing B. damaging C. polluting D. destroying 18. Government have passed laws to protect wildlife from commercial trade. A. enabled B. enforced C. enacted D. ensured 19. Poisonous gases _____________ many factories destroy the ozone layer. A. over B. from C. above D. around 20. We first ________ each other in London in 2006. A. met B. have met C. meet D. had met 21. Our teacher came in when we _________noisily. A. had talked B. were talking C. Are talking D. have Been talking 22. : - “You look nice today. I like your new hairstyle.” - “ _______________” A. It’s nice of you to say so. B. Shall I? Thanks. C. Oh, we done! D. I feel interesting to hear that. 23. Jack was my_____________ in the tennis match. A. opposing B. opponent C. opposition D. opposite 24. Most Americans don’t object _______being called their first names. A. for B. to C. in D. about 25. During the lecture yesterday, he _______the importance of a good education. A. had stressed B. have stressed C. stressed D. stresses 26. You ____________shout. I'm not deaf. A. mustn't B. needn't C. shouldn’t D. can't 27. Yesterday I bought ________ umbrella in __________big shop. A. A- A B. An- the C. An- x(zero) D. An - A 28. Be careful. The vase is very heavy. You _________ drop it. A. must B. need C. have to D. might
trình bày suy nghĩ của anh/chị về ý kiến: “Mỗi một người đều có vai trò trong cuộc đời này và đều đáng được ghi nhận”.
Giúp vs hứa vote Cần gấp lắm ạ
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