Rút gọn biểu thức:(x 2 – 2xy + y 2 )(x – y) – (x – y)(x 2 + xy + y 2 )

Tìm quan hệ từ thích hợp điền vào chỗ chấm trong các câu sau (Câu hỏi ) a) Tôi khuyên nó..................Nó Vẫn không nghe. B) Mưa rất to....... ............gió rất lớn. A) Cậu đọc................Tớ đọc

Exercise 3. Put the verbs in brackets in the correct tense form. 1. You ever (do) ……………………… volunteer work? 2. Yes, I (do) ……………………… volunteer work last month. 3. I (collect) ……………………… hundreds of old books and clothes for street children so far. 4. My sister wants to raise funds for street children so she (make) ……………………… hundreds of postcards to sell them. 5. My hobby is carving eggshells and now I (carve) ……………………… nearly 100. 6. Going home from school yesterday, I (help) ……………………… an old man to go cross the street. 7. Last Tuesday, I (go) ……………………… home late because there was a traffic jam near my school. 8. At Tet, my mother and her close friends often go to the hospitals to donate cakes, sweets and ……………………… for the sick children there. She (do) ……………………… it for many years. 9. Lan never (eat) ……………………… Banh tet. She will try some this year. 10. Linh is my close friend. We (know) ……………………… each other for 5 years. Exercise 4. Put the verbs in brackets in the correct tense form. 1. We like (come)……………………to school by bus, but we hate (stand)………………………. and (wait) …………………… in the rain. 2. My house (decorate)…………………… by the new painters last week. 3. There is nothing like (walk)……………………as a means of (keep)……………………fit. 4. The Silver medal (give)……………………… to him yesterday in the formal atmosphere by the Vice Director of the company. 5. The weather last year (be)………………………not so cold as this year.

mọi người giúp em phần b voi ạ

tính tổng các số nguyên sau a+3 bé hơn hoặc bằng x và bé hơn hoặc bằng a+2018

giúp mik với nhé các bạn, mong bạn giúp đỡ!

Exercise 1. Put the verbs in brackets in the correct tense form. 1. You (think) ……………………… collecting stamps costs much money? 2. My father thinks mountain climbing (be) ……………………… more dangerous than skating. 3. Every year, my mother (give) ……………………… me a nice doll on my birthday. 4. My brother (not like) ……………………… collecting stamps, he likes collecting glass bottles. 5. My sister likes (cook) ……………………… very much. She can cook many good foods. 6. Does your brother like (listen) ……………………… to music in his free time? 7. I think in the future, more people (enjoy) ……………………… going out by bicycles. 8. My father says when he's retired, he (go) ……………………… back to his village to do the gardening. 9. We are planting trees around our school now. Our school (be) ……………………… surrounded by a lot of green trees. 10. Jenny says she loves collecting pens but she (not/continue) ……………………… this hobby from next year. Exercise 2. Put the verbs in brackets in the correct tense form. 1. Nam looks brown. He was on holiday last week. He (get)………………………sunburn. 2. Getting plenty of rest is very good. It (help)…………………. you to avoid depression. 3. The Japanese (eat)………………………..a lot of fish so they are very intelligent. 4. If you wash your hands more, you (have)…………………….less chance of catching flu. 5. Eating carrots regularly (help)……………………….you see better. 6. It is very hot outside. Please (wear)…………………a sun hat when you go out. 7. Do more exercise and you (feel)………………………..healthier. 8. I don’t want (be)……………………………..tired tomorrow so I go to bed early. 9. Nowadays, I don’t feel well. I often (feel)……………………….sick and weak. 10. People who (smile)……………………….more are happier and they live longer.

Trở ngại lớn nhất cho phát triển kinh tế của các nước Nam Á là A: tình hình chính trị -xã hội không ổn định. B: tồn tại nhiều mâu thuẫn, xung đột. C: tài nguyên thiên nhiên nghèo nàn. D: khí hậu khắc nghiệt, khô hạn.

hãy nêu nguyên tắc sắp xếp các nguyên tố trong tuần hoàn ? bảng tuần hoàn có bao nhiu chu kì và bao nhiu nhóm

50 điểm cho ai giải được bài này thật sự $\left \{ {{x-y-1=0} \atop {x^{2}-2y^{2}-xy+5y-x-2=0}} \right.$ đừng ham điểm mà trả lời bừa nha