1. Một hình thang có đáy bé là 12 cm, đáy lớn gấp rưỡi đáy bé , chiều cao bằng trung bình cộng hai đáy. Tính diện tích hình thang. 2. Kết quả điều tra về ý thích một số môn thể thao của 100 học sinh khối 5 là: 12% đá cầu, 25% cầu lông, 13% cờ vua, 50% đá bóng. Tính HS mỗi môn.

How Nam has improved his English In the first year of lower secondary school, I had some difficulties in learning English. My English pronunciation was really bad and my English grammar was worse. I did not know how to improve them. I didn’t want my father and mother to know about this. One afternoon after the lesson, my teacher of English told me to wait for her outside the classroom. She took me to the school library and showed me cassettes of pronunciation drills kept in a glass bookcase. She also told me how to use an English - English dictionary to improve my English grammar. “Now I think you know what you should do”, said she. I made much progress and only one year later, I won the first prize in the English Speaking Contest held for secondary school students in my hometown. 1. What difficulties did Nam have in learning English in the first year? A. The pronunciation B. The grammar C. Both pronunciation and grammar D. The way of improving his pronunciation 2. Who wanted to meet him one afternoon after the lesson? A. His teacher B. One of his friends C. His father D. His mother 3. Where did Nam and his teacher go after that? A. to the town library B. to the school library C. to the teachers’ room D. to his house 4. What did the teacher show him then? A. A glass bookcase B. An English-English dictionary C. An English Grammar book D. Cassettes of pronunciation drills 5. What did he win in the English Speaking Contest one year later? A. The first prize B. The second prize C. The third prize D. The fourth prize

loại hoa nào phổ biến nhất ? a.hoa giả b.hoa tươi c.hoa giấy

Các pro giúp em với cảm ơn trc 3. Combine each of the following pairs of sentences into one sentence, using (not) adjective + enough. Example: He is strong. He can carry the box. He is strong enough to carry the box. a) The weather wasn’t very warm. We couldn’t go swimming. b) He wasn’t very experienced. He couldn’t do the job. c) The ladder wasn’t very long. It didn’t reach the window. d) The tea isn’t strong. It won’t keep us awake. e) The fire isn’t very hot. It won’t boil the kettle. f) The ice is quite thick. We can walk on it. g) It wasn’t very warm. We couldn’t sit in the garden.

Cho 22,4 gam Fe tác dụng với dung dịch loãng có chứa 24,5 gam H2SO4. Thể tích khí H2 thu được là: Cho 5,4 gam Al tác dụng với dung dịch loãng có chứa 44,1 gam H2SO4. Thể tích khí H2 thu được là:

8,14,16 ( kèm giải thích , ko giải thích mà khoanh bừa thì mình báo cáo )))))

Bai 1:Tinh ti khoi khi X doi vs H2 bang 32.Hay xac dinh cong thuc cua X Bai 2:cho khoi luong cua mot so chat nhu sau a)5,4gam nuoc b)17,55gam natri clorua c)6,4gam khi sunfuro d)28gam canxi oxit Khoi luong hop chat nao co so phan tu nhieu hon?

Giải nhanh và chính xác giúp e với dag cần gấp ạ hứa vote 5*

Giúp mình với mình rất rất cảm ơn

Cho ΔABC vuông tại A. Gọi O là trung điểm BC. Trên các cạnh AB, AC lần lượt lấy các điểm M, N sao cho MON= $90^{o}$. Tính tỉ số $\frac{MB²+NC²}{MN²}$