tìm 4 phân số a/b sao cho 5/6<a/b<6/7

Lập niên biểu các sự kiện cách mạng công nghiệp ở Pháp và Đức

Tóm tắt truyện Tấm Cám đầy đủ, ngắn gọn

Ai giúp em với (bài 42 nha) #em cảm ơn trước

1 hơp chất phân tử gồm 1 nguyên tử nguyên tố x liên kết với nguyên tử oxi và có tỉ khối hơn heli là 11,5 a) cho biết nguyên tử khối x tên và kí hiệu nguyên tố x xác định công thức của hợp chât b) tính phần trăm về tỉ khối của nguyên tố x trong hợp chất c)hòa tan hoàn toàn 10,2 gam 1oxit của kim laoij hóa trị 3 cần 33,8 gam h2so4 vừa đủ đung dịch muối thu được sau phản ứng có nồn độ 10 phần trăm xác định công thức phân tử kim loại

cách để biểu diễn âm thanh và hình ảnh trong máy tính

Rewrite the following sentences without changing the meaning, using the word given 47. We decided to go out because the weather was good. (so) ____________________________________________________________________ 48. Tokyo is among the largest cities in the world. (one) ____________________________________________________________________ 49. This game show is interesting. That game show is so boring. (but) ____________________________________________________________________ 50. He has lived in New York since 2005. (stared) ____________________________________________________________________ Complete the second sentence so that it has the similar meaning to the first one. 51. I have studied English for three years. I began_____________________________________________________________ 52. Living in Bac Giang is cheaper than living in Hai Phong. Living in Hai Phong__________________________________________________ 53. She started driving 1 month ago. She has_____________________________________________________________ 54. No cities in Viet Nam are more crowded than Ho Chi Minh City. Ho Chi Minh City is the_______________________________________________ 55. I didn't have any class yesterday, so I played sports. Because____________________________________________________________ 56. It is the first time our team has won a big match. We have never_______________________________________________________ 57. Minh began to collect stamps in 2000. Minh has___________________________________________________________ 58. We started living here fifteen years ago. We have____________________________________________________________ 59. I have never visited this beautiful place before. This is the first time___________________________________________________ 60. We started living here fifteen years ago. We have____________________________________________________________ 61. She is short, but she still plays basketball. Although___________________________________________________________ 62. It started raining an hour ago. It has_______________________________________________________________ 63. When did you start learning English? How long___________________________________________________________ 64. Minh began to collect stamps in 2000. Minh has___________________________________________________________ 65. When did you start learning English? How long___________________________________________________________ 66. I haven’t eaten this kind of food before. This is______________________________________________________________ 67. For me, no kinds of sports are more interesting than football For me, football is____________________________________________________ 68. The last time she visited me was five years ago. She hasn't___________________________________________________________ 69. I started learning English in 2000. I have______________________________________________________________ 70. I have never been to Da Lat before. This is the first time___________________________________________________ 71. It is a long time since we last met. We haven’t__________________________________________________________ 72. I last saw Peter five months ago. I haven't____________________________________________________________ 73. I last wrote to my uncle in July. I haven't____________________________________________________________ 74. The last time she visited me was five years ago. She hasn’t___________________________________________________________ 75. I last wrote to my uncle in July. I haven’t____________________________________________________________ 76. No cities in Vietnam are more crowded than Ho Chi Minh city. Ho Chi Minh city is___________________________________________________ 77. The last time we saw her was on Christmas day. We haven’t__________________________________________________________ 78. It’s long time since we became close friend. We have____________________________________________________________ 79. I have studied English for three years. I began_____________________________________________________________ 80. I last saw him 2 weeks ago. I haven't____________________________________________________________

Cần rất gấp,trước 21:00 tối Đừng để phí điểm em nha.Ngìn nó dài nhưng đọc kĩ sẽ thấy nó dễ.Đừng nhìn hình mà thoát Nó dài nên mới cho 40 đ đó Ko rõ hỏi dưới phần bik luận* cấm hỏi chỗ câu trả lời. Tl linh tinh=spam Cám mơn mng

Mọi người giúp em với ạ, em cám ơn nhiều❤ Ý 2,3 ạ

Bài 1:Chứng minh đẳng thức sau: $(a^2-b^2)(c^2-d^2)=(ac+bd)^2-(ad+bc)^2$ Bài 2: Cho $a+b+c=7$ và $ab+bc+ca =9$ Tính $M= a^2+b^2+c^2$