Cho góc nhọn xOy, trên 2 cạnh Ox,Oy lần lượt lấy 2 điểm A và B sao cho OA=OB, tia phân giác của góc xOy cắt AB tại I a)CM OI vuông góc với AB b)D là hình chiếu của A trên Oy, C là giao điểm của AD với OI.CM BC vuông góc với Ox

Chất nào làm mất màu dung dịch brom

VI. Put the sentences in the right order from 2-11 to make a logical dialogue.Number 1 and 12 are done for you (5pts). 1.F ; 2….; 3….; 4…..; 5…..; 6……; 7……; 8…….; 9…….; 10……; 11…….; 12.I A. How can we do that, Dad? B. Sure, Dad. C. And we will use renewable energy sources like solar energy. D. I will ride a bike to school tomorrow. What else, Dad? E. We can travel by public transport or bicycles. F. What are non-renewable sources of energy, Dad? G. Is it a better source of energy? H. Oh, so they will run out. I. Yes, it is clean and plentiful. J. Yes. That’s why we have to save the energy. L. Well, those sources of energy are limited and can’t be replaced after use. M. You should turn off the TV or computer when you don’t use them.

giúp mik vs m.n, mik đang câng gấp

V. Supply the correct tense/form of the verbs in brackets to complete the following sentences (5pts) 1. We ………..(go) out of the classroom without turning off the light yesterday. 2. My son will not go to bed until he ………..(finish) his homework. 3. Each of the boys………………. (complete) the English test up to now. 4. Don’t disturb me! I want ……….. (leave) alone in this room. 5. 6 months ……….. (be) toolong for me to wait for the answer . 6. I ‘d rather you ……….. …………..(not choose) this computer. 7. At this time next Friday, Mai ……….. (visit) Halong bay with her classmates. 8. I don’t know where ……….. (buy) English books now 9. “Where is your grandfather. ” – “He ……….. (make) sticky rice cakes in the yard ” 10. Facebook ……….. (get) more and more popula.

Cho 17.6g hỗn hợp gồm Fe ,Mg,Cu vào dd H2SO4 đ,nguội dư thì thu được 6.16lit khí SO2 đktc. Lấy cùng lượng Fe có trong 17,6 g hỗn hợp trên cho tác dụng với dd HCl dư thấy có 1.12lit khí đktc. Tính % khối lượng hỗn hợp ban đầu.

IV. Choose the best answer by circling A, B, C or D to complete the sentences (10pts) 1. My sons are ____________of seeing the dentist. A. afraid B. interested C. worried D. keen 2. Don’t buy plenty of ____________foods because they’re not ____________for you. A. fatty/ good B. fatter/ better C. fat/ good D. fatty/ well 3. In Today’s newspaper there ____________a lot of news about Mr Park Hang Seo. A. have B. has C. is D. are 4. Now To Quyen is used ____________up late to study lessons. A. to study B. studying C. for studying D. to studying 5. No one can do it well and ____________. A. so can she B. neither can she C. she can’t, too D. she can, either 6. The doctor advised me ____________. A. smoke B. not smoking C. not to smoke D. not to smoking 7. We fancy ____________in summer. A. swim B. swimming C. swam D. to swim 8. The spinach is very good for you, but you must wash it ____________. A. care B. careful C. carelessly D. carefully 9. “Would you like some corn?” - “___________” A. Yes, I would B.All right C. No, thanks. I am full D. Ok, I don’t like corn 10. The boss wants his_____________to type some letters. A. secretary B. novelist C. journalist D. musician

III. Choose the word whose stress pattern is different from the others by circling A,B,C or D (2,5pts) 1.A. diver B. vessel C. avoid D. coral 2.A. cucumber B. moderate C. stomachache D. contestant 3.A. relax B. marbles C. comic D. atlas 4.A. horrible B. expensive C. compliment D. terrible A. lawyer B. morning C. question D. report

Tìm m để bất phương trình (m+1)x-m² + m+12> 0 có tập nghiệm là R*. Giúp mình với nhé mn

Ankadien liên hợp là hiđrocacbon trong phân tử nào