Phương trình hóa học của phản ứng nào sau đây thuộc loại phản ứng thế? A: Fe+ H 2 S O 4(l) → FeS O 4 + H 2 ↑ B: 2Mg + O 2 t o → 2MgO C: 2KMn O 4 t o → K 2 Mn O 4 +Mn O 2 + O 2 ↑ D: Ca(OH)2 + 2HCl → CaCl2 + 2H2 O

Choose the word whose underlined part is pronounced differently from the others. A: engine B: precise C: explore D: enormous 7 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. Scientists have recently argued that Einstein’s contributions to Physics and Mathematics are less important than Newton’s. A: just now B: shortly C: at once D: before 8 Choose the best answer A, B, C or D to complete the sentence. Question 8: He said he hadn’t finished the project ______. A: last week B: previous week C: yesterday D: the previous week 9 Choose the word whose stressed pattern is pronounced differently from the others. A: patient B: science C: quality D: become 10 Choose the word whose underlined part is pronounced differently from the others. A: space B: stand C: able D: face

Đốt cháy photpho trong 6,72l khí oxi (đktc) A, tính khối lượng p đã dùng B,tính khối lượng sản phẩm thu được sau phản ứng

Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges. Question 14. Paul: “Good morning, could I speak to Mr. David, please?”. Tom: “__________” A: Certainly. Would two o’clock be OK. B: Probably by Monday next week. C: I’ll have to ask the person you want to ring first. D: He’s in a meeting. Can I take a message? 2 Choose the word whose stressed pattern is pronounced differently from the others . A: invent B: educate C: support D: improve 3 Choose the best answer A, B, C or D to complete the sentence. Question 12: Neil Armstrong, the first man to walk on the moon, is one of the greatest _____. A: exploring B: exploration C: explore D: explorers 4 Choose the underlined part A, B, C or D that needs correcting. Picture 3 A: A B: B C: C D: D 5 Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question 16. The famous inventor was not brought up in a well-off family. A: rich B: wealthy C: poor D: kind

Giúp mik vs ạ tí nx ph nộp r CÁM ƠN NHÁ

Nhóm A bao gồm các nguyên tố: A. Nguyên tố s B. Nguyên tố p C. Nguyên tố d và nguyên tố f. D. Nguyên tố s và nguyên tố p

Mn ơi ai giỏi hóa giải chi tiết cho e câu này vs ạ. E cảm ơn..

Cho dt(o)tu 1 diem P ben ngoai dt ve cat tuyen PAB va 2 tiep tuyen PM,PN vs dt (o)(M thuoc cung AB nho)lay D la diem chinh giua cua cung lon AB,DM cat AB tai I. a)CM:PM=PI b)CM:IA.NB=IB.NA

tìm x ,-2 * ( -x -5 ) + 18 = 20 - 3 * ( x + 4 )

VẼ FL.ADC cho mình với KO chép mạng nha