Làm sao thuộc nhanh bảng nguyên tố hóa học mng :))

Vẽ đậu mầm ajjjjjjjjjj , tks trc ạ G

Giải hệ phương trình: $\left \{ {{x-3y=6} \atop {-3x+9y=-18}} \right.$

Mời các best tiếng anh hộ e với ạ

Giải giúp mình ạ mình đang cần gấp lắm

37.They couldn’t find Mrs. Pike’s shop, because it was _________ from all others in the street. (DISTINGUISH) 38.Nam is one of the __________________ on a boat trip on the Dakbla River. (PARTICIPATE) 39. My brother often does experiments about electricity for _________________. (PLEASE) 40. ________________________ is destroying large areas of tropical rainforest. (FOREST)

Cho phương trình: $x^2-(2m+1)x+m^2+1=0$ Tìm Min $2|x_1-x_2|$

Khảo sát sự biến thiên của hàm số $y$ $=$ $\sqrt{2018x-x^2}$

1. I (learn) English for seven years now. 2. But last year I (not/ work) hard enough for English, that's why my marks (not/ be) really that good then. 3. As I (pass/ want) my English exam successfully next year, I (study) harder this term. 4. During my last summer holidays, my parents (send) me on a language course to London. 5. It (be) great and I (think) I (learn) a lot. 6. Before I (go) to London, I (not/ enjoy) learning English. 7. But while I (do) the language course, I (meet) lots of young people from all over the world. 8. There I (notice) how important it (be) to speak foreign languages nowadays. 9. Now I (have) much more fun learning English than I (have) before the course. 10. At the moment I (revise) English grammar. 11. And I (begin/ already) to read the texts in my English textbooks again. 12. I (think) I (do) one unit every week. 13. My exam (be) on 15 May, so there (not/ be) any time to be lost. 14. If I (pass) my exams successfully, I (start) an apprenticeship in September. 15. And after my apprenticeship, maybe I (go) back to London to work there for a while. 16. As you (see/ can), I (become) a real London fan already.

Exercise: Rearrange the words to make sentences 1. started/ years/ I/ rubbish/ three/ recycling/ ago. 2. for/ Mary/ windows/ hasn’t/ the/ cleaned/ two/ months. 3. you/ Have/ finished/ homework/ your/ yet? 4. have/ television/ never/ before./ We/ that/ program/ watched 5. another/ We/ to/ 1999./ city/ in/ moved 6. didn’t / this/ Jane/ church/ to/ go/ morning. 7. medal/ have/ I/ winning/ for/ a/ a/ dreamt/ long/ of/ time. 8. eaten/ it/ We/ started/ have/ since/ raining. 9. Was/ at/ Luke/ morning?/ home/ yesterday 10. got/ nine/ They/ up/ at/ o’clock/ yesterday.