Giúp mình với ạ Giúp mình vote mỗi bạn 5 * Ạ

lập dàn ý cho hiện tượng “hàng ngàn,hàng vạn người khác tự nguyện lao vào tâm dịch trực tiếp đối mặt với nguy hiểm để giành giật sự ssoosng và tìm cách khống chế dịch bệnh"

1)Cho hệ phương trình: x+my=9m và x−3y=4 Chứng minh hệ phương trình luôn luôn có nghiệm duy nhất với mọi m. 2) cho hệ phương trình: 3x-my=-9 và mx+2y=16 Với trị nguyên nào của m để hệ có nghiệm (x;y) thỏa mãn x+y=7 3) Với giá trị nào của m thì ba đường thẳng: 3x+2y=4; 2x-y=m; x+2y=3 quy đồng

Khoanh tròn vào chữ cái đặt trước câu trả lời đúng Câu 1: Chữ số 5 trong số thập phân 63,254 thuộc hàng nào? A. Hàng nghìn B. Hàng phần mười C. Hàng phần trăm D. Hàng phần nghìn Câu 2: Kết quả của biểu thức 0, 25 x 6,48 x 0,4 là: A. 64,8 B. 6,48 C. 0,648 D. 0,0648 Câu 3 Dãy số nào có các số được xếp theo thứ tự từ bé đến lớn là: A. 5,978; 5,798; 5,897; 5,789; 5,879 B. 5,789; 5,798; 5,879; 5,897; 5,978 C. 5,897; 5,798; 5,978; 5,789; 5,879 D. 5,978; 5,897; 5,879; 5,798; 5,789 Câu 4: 2m2 4dm2= .................m2; số thích hợp điền vào chỗ chấm là: a. 2,004 b. 2,04 c. 2, 4 d. 2,0004 Câu 5: Số nào dưới đây có cùng giá trị với 3,07 dm2 a. 3 m2 7dm2 b. 3dm2 70cm2 c. 3m2 70dm2 d. 3dm2 7cm2 Câu 6. Diện tích một hình tam giác là 3,2dm2, độ dài đáy của tam giác đó là 1,6dm. Chiều cao của tam giác đó là: A. 2dm B. 4dm C. 8dm D. 16dm Câu 7: Một hình thang có trung bình cộng hai đáy là 25,6cm, chiều cao là 18 cm. Diện tích hình thang đó là: A. 230,4cm2 B. 406,8 cm2 C. 231,4cm2 D. 460,8 cm2 Câu 8: 32% của một bao gạo là 16kg. Vậy bao gạo đó nặng là: A. 5,12 kg B. 51, 2kg C. 50 kg D. 20 kg Câu 9 . Mỗi chuyến xe tải chở được 3,5 tấn gạo. Hỏi để chuyển hết 22,4 tấn gạo ở một kho thì cần ít nhất bao nhiêu chuyến xe như thế? A. 5 B. 6 C.6,4 D. 7

Exercise 11: Identify the mistake in each sentence and correct it. 1. On the way home, we saw a lot of men, women and dogs which were playing in the park. 2. The man whom remained in the office was the manager. 3. This novel, which written by a well-known writer, should be read. 4. My friend George, that arrived late, was not permitted to enter the class. 5. This is the only place which I can obtain scientific information. 6. Chemistry is one branch of science on that most of the industries depend. 7. 1975 is the year in when the revolution took place. 8. Mr. Brown, that teaches me English, is coming today. 9. The hotel where we stayed in last year was excellent. 10. At last they found the woman and her cat which were badly injured by the fire.

Người ta pha 3 kg nước nóng ở 90 độ C với 2 kg nước lạnh ở 20 độ C. Tính nhiệt độ sau cùng cuả nước (bỏ qua sự mất nhiệt) Giúp mình với.Tks

Mn giúp em bài 2 với ạ mấy câu thôi cũng đc ạ!! Em cảm ơn

Exercise 9: Complete the sentences with the correct relative pronouns. 1. The woman _________ I spoke to is Japanese. 2. Please show me the website on ________ you found this reference. 3. Newcastle, through ________ we drove, looked peaceful. 4. It was Nina _______ didn’t turn up at the meeting. 5. Mrs. Richmond, _______ is 42, has three children. 6. Dorothy said something _______ I couldn’t hear clearly. 7. There was a little _______ we could do to help her. 8. I’d like to get a newspaper, please. The one _______ has the news about the election. 9. Your mother, _______ answered the phone, told me you were sick. 10. Hide and seek is a game _______ I like to play as a child.

Exercise 8: Choose the best answer. 1. The students are reading some books …………. are on disasters. a. who b. whom c. which 2. The lion-tamer and his lion ………… we saw on the stage came from Moscow. a. who b. which c. that 3. The children ………. are playing in the back yard are Mr. Ba’s nephews. a. whom b. that c. which 4. Vietnam, ……….. is in the Southeast Asia is considered the pearl of the region. a. which b. that c. where 5. We are going to visit Ha Long Bay, ……… is one of the most interesting places of the North. a. what b. which c. where 6. Hoa and her dog ……….. are standing over there go to the park every Sunday morning. a. that b. who c. which 7. The word “typhoon” ………. comes from the Chinese means “big wind”. a. who b. that c. when 8. Mount Pinatubo, ……… erupted in 1991, is in Philippines. a. who b. which c. when 9. Hundreds of people died in that volcanic eruption………had been warned before. a. who b. which c. when 10. Tornadoes can suck up things……....are in their path. a. who b. that c. where 11. The huge earthquake…….. struck the city of Kobe in Japan killed a large number of people. a. who b. that c. where 12. Neil Armstrong, ……. was the first man walking on the moon is an American. a. who b. which c. whom 13. Nobody predicted the earthquake ……….. occurred in Virginia in 2003. a. who b. which c. when 14. My father will fly to Ha Noi ,……….. is the capital city of Vietnam. a. who b. which c. where 15. My class mates dislike postcards ………. show rough sea and cloudy sky. a. who b. where c. which 16. Mr. Brown, …... is said to be the most famous doctor of the city, has receive an award from the Government. a. which b. who c. whom 17. They called their friends …….. have lived in this city for a long time, to ask for help. a. who b. which c. whom 18. The boys gave their friends some posters ……… they bought yesterday. a. which b. who c. whom 19. She showed her parents a picture of the places …….. she had visited. a. which b. who c. where 20. My mother bought a lot of stuff ……. we might need for our house. a. that b. who c. when

Exercise 7: Underline the correct word in each sentence. 1. Do you know whom/ whose laptop this is? 2. Everyone who/ which was at the party was delighted at his arrival. 3. There comes a bus which/ what can take us to the zoo. 4. Jim, whom/ that I met at the rail station, turned out to be my best friend’s brother. 5. My father often takes a train which/ who passes by Macquarie University every day. 6. Summer is the time when/ where we often have outings together. 7. That/ What my kids like the best is an afternoon at the local amusement park. 8. The people which/ whose luggage was lost had to report to the lost properties office. 9. Where’s the glasses whose/ that I left on this bookshelf? 10. The shop where/ that I went to didn’t have the rice I need.