Cách nào để xác định quĩ đạo của? Cách xác định vị trí của vật? Cách xác định thời gian của vật? Để xác định thời gian của vật ta phải làm gì? Thế nào là thời gian, thời điểm? Để xác định thời gian của vật ta phải làm gì?

The Vietnamese students take part in different after - school activities. Some students play sports. They often play soccer, table tennis or badminton. Sometimes they go swimming in the swimming pools. Some students like music, drama and movies. They often practice playing musical instrument in the school music room. They join in the school theater group and usually rehearse plays. Some are members of the stamp collector‟s club. They often get together and talk about their stamps. A few students stay at home and play video games or computer games. Most of them enjoy their activities after school hours. 1.Which sports do some students often play? 2.How often do they go swimming? 3.Where do some students often practice playing musical instruments? 4.How often do they rehearse plays? 5.What do the members of the stamp collector‟s club often do? 6.Do Vietnamese students enjoy their activities?

Na2O + H3PO4 ---- > K2O + H3PO4 ---- > Li2O + H3PO4 ---- > CaO + H3PO4 ---- > BaO + H3PO4 ---- > Fe2O3 + H3PO4 ---- > CuO + H3PO4 ---- > Giúp mình với

cần gấp !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mom: Don’t spend your free time on computer games. John: ___________________ A. Ok, I won’t. B. I adore computer games C. You’re welcome.

Giải giúp em với ạ, em cảm ơn nhiều

3x^2-3x(-2+x) làm xong mình cho 5sao

Ex V. Fill in the gaps with the correct form of the word in brackets 1. Children are recommended to eat more seafood as it helps them build ……………. bones. (HEALTH) 2. The boy shouldn’t watch horror films or …………… TV programs as he often has nightmares. (FRIGHTEN) 3. The press came to the presentation with a view to collecting ………………….. (INFROM) 4. ……………….., over ninety percent of the damage caused by fire rather than by the collapse of the buildings. (CONSEQUENT) 5. The increasing number of the ……………… of the city has pose some serious problems. (INHABIT) 6. Our training group ……………… increased as more people joined in yesterday morning. (GRADUAL) 7. It is not difficult to make some …………….. about the future development of the economy. (PREDICT) 8. The concert ………………. takes place in the city hall where many local citizens come to see this time of the year. (NORMAL) 9. The Internet is one of many ……………. in our modern life and it brings us enormous benefits. (INVENT) 10. With all forms of exercise, it is important to start slowly and build up …………….. (GENTLE)

Ex IV. Match the words in column A with those in column B A B 1.gain a. bad habits 2.prevent b. the destination 3.boost c. some medicine 4. get rid of d. weight 5.do e.an important decision 6.stay f. enough money 7.take g. a lot of exercise 8.make i. the problems 9.reach i. some serious diseases 10.solve j. daily routine 11.keep k. the memory function 12.save l. healthy

em cần cấp ạ, nhờ anh chị giúp em.