it is time they bring the cows in

Rút gọn phân các số a,3.5.7.11.13.37-10101/1212120 b,4^2.5.11/44.20;13.15.6/18.65.7;7.5.8.5^2/14.2.5;2^2.3^3.5/3.2^3.5^3

một hỗn hợp khí X gồm 0,25 mol khí SO2, 0,15 mol khí CO2, 0,65 mol khí N2 và 0,45 mol khí H2 a/ tính thể tích của hỗn hợp khí (đktc) b/ tính khối lượng của hỗn hợp khí X

I. Use the cues to make sentences in the present perfect. 1. I/ buy/ a laptop/ but I/ not use/ it. __________________________________________________ 2. I/ write/ a blog/ but I/ not upload/ any photos to it. __________________________________________________ 3. We/ start/ the game/ half an hour ago/ but we/ not finish/ it. __________________________________________________ 4. My dad/ be/ to London/ but he/ not see/ Big Ben. __________________________________________________ 5. I/ read/ my English book/ but I/ not do/ my English homework. __________________________________________________ II. Arrange these words to make meaningful sentences. 1. you/ have/ finished/ homework/ your/ yet? _______________________________________________ 2. printer/ under/ this/ guarantee/ is. _______________________________________________ 3. vacation/ since/ we/ haven’t/ last/ had/ a/ year. ______________________________________________ 4. Ha Noi/ homeless/ give/ in/ clothes/ away/ they/ warm/ to/ people. _______________________________________________ 5. our/ a/ in/ makes/ volunteering/ difference/ community _______________________________________________

Đồng bằng sông Cửu Long là vùng trọng điểm cả nước về cây lương thực nào ?

Write a paragraph within 140 words about advantages and disadvantages of sources of energy Giúp mình với ạ !!

Giúp mik vs ạ (cần gấp lắm ạ:( !!)

Giải phương trình 2x - (3 -5x) = 4 ( x + 3 ) Giúp mình với mng ơi

I. Put the verbs in brackets in the correct verb tense: the Present Perfect or Past Simple 1. My uncle (move) _________________ to Da Lat in 2005. 2. The Greens (be) _________________ to many countries in the world so far. 3. We (go) _________________ to that village to do volunteer work several times. 4. We (spend) _________________ our summer vacation in Ha Long Bay last July. 5. Our teacher (explain) _________________ to us how to use the printer already. 6. The postman (deliver) _________________ the letter half an hour ago. 7. Mai (not finish) _________________ her homework yet. 8. I (visit) _________________ our form teacher in the hospital already. 9. I (hear) _________________ the good news from Mary a few minutes ago. 10. They (not start) _________________ the project yet. II. Fill in each gap the missing question in order to finish the conversation between the interviewer (I) and the volunteer (V). - How long was each class - What did you teach them - What were the evening classes like - Who were your students - How about evening class for adult I: Well, (1) __________________________________________ ? V: The beginners. I: (2) __________________________________________ ? V: We taught them to read and write. I: (3) __________________________________________ ? I read it in your working plans. V: Oh, yes. We also taught adults to read and write in the evening when they were off work. I: (4) __________________________________________ ? V: Not more than 2 hours. I: (5) __________________________________________ ? V:Oh, there was a lot of fun! During class time we also set up some games for the kids.

Tính 13-12+11+10-9+8-7-6+5-4+3+2-1