Thực hành mạch điện cơ bản Cho R1 - 10 ôm , R2 - 40 ôm , R3 - 60 ôm , R4 - 15 ôm tính trở tương đương mạch Rtd = ? Nếu như nắp các điện trở có bóng đèn như vậy bóng nào sáng nhất bóng nào tối nhất

bài 6 á II. ADJECTIVE + TO - INFINITE AND ADJECTIVE + THAT - CLAUSE. 1. Rewrite the sentences using the structure “Adjective + to - infinitive”. 1. Giving me the last other cake was nice. ___________________________________________________________ 2. Learning about the old transport system in Hanoi was eye - opening. ___________________________________________________________ 3. Remembering all the Maths formula for the test is very hard. ___________________________________________________________ 4. Knowing exactly when Ho Chi Minh City’s metro will open is hard. ___________________________________________________________ 5. Doing this project in 24 hours is impossible. ___________________________________________________________ 6. Taking a break twice a day is important. ___________________________________________________________ 7. Working on your own project is possible. ___________________________________________________________ 8. Being here is exciting. ___________________________________________________________ 9. Guessing what will happen 30 years from now is difficult. ___________________________________________________________ 10. In this busy world, parents and children don’t have much quality time for each other. It is such a pity. ___________________________________________________________

Cho biểu thức B=\frac{1}{5^{2} } + \frac{1}{6^{2} } + \frac{1}{7^{2} } + ... + \frac{1}{100^{2} }. Chứng tỏ rằng \frac{1}{6} < B < \frac{1}{4}

Cho 2.76 gam hợp chất A (chứa C, H, O) có CTPT trùng với CTDGN tác dụng với NaOH vừa đủ. Tạo ra muốn khan B và 0,72 gam nước. Nung nóng B trong oxi dư để cho các phản ứng hoàn toàn, thu đc 2,12 gam chất rắn D; đc 0,72 gam hơi nước và 2.688 lít (đktc) khí CO2. Xác định CTPT của A. Tính tỉ lệ số mol nA:n NaOH

làm hộ mình nhé hứa vote 5 sao + ctlhn

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III. Choose the best answer a, b, c or d to complete the sentence. 1. How is your first week _________ school? a. on b. at c. for d. to 2. My brother often helps me_________ my homework. a. at b. about c. for d. with 3. Megan is_________ badminton with her friends in the schoolyard. a. having b. studying c. playing d. doing 4. The villa is_________by pine trees. a. surrounded b. built c. covered d. grounded 5. We do_________ in the gym every afternoon. a. table tennis b. football c. judo d. homework 6. _________ does Jane have science?~ On Monday and Friday. a. Where b. What c. When d. What time 7. Nowadays, students often use_________ in mathematics lessons. a. rubbers b. calculators c. pencils d. dictionaries 8. My cousin goes to a_________ school, so she only comes home at weekends. a. boarding b. private c. public d. international 9. You look really_________ in your new uniform! a. excited b. smart c. healthy d. interesting 10. _________ your parents give you pocket money? a. Is b. Are c. Do d. Does

Exercise 3: Tìm và sửa lỗi sai (nếu có) 1.There aren’t some pencils in the bag. 2. There are a ring, two desks, a notebook on the table. 3. There isn’t some water in the glass. 4. There aren’t any money in her wallet. 5. There are a letter on his desk. His father brought it from the post office

em hãy viết một đoạn văn ( khoảng 200 chữ ) trình bày suy nghĩ của mình về giá trị của lòng tự trọng giúp em với nhaaa :((

Công thức hoá học nào sau đây là đúng?sai? Nếu sai thì sửa lại cho đúng A. AL3O2; K3O; CuO; FeOH2; NaNO3 B. FeCL2; CuS; MnO2