Nêu đặc điểm quan trọng nhất để phân biệt cá sụn với cá xương.

Cho tam giác ABC vuông tại A, AC > AB. Trung trực của AB cắt BC tại I. a) Chứng minh rằng AIB và AIC là các tam giác cân. b) Từ I kẻ đường thẳng d vuông góc với BC, cắt tia BA và AC tại M và N; tia BN cắt CM tại E. Chứng minh rằng EB vuông góc MC. c) Chứng minh rằng các đường thẳng EA và BC song song với nhau. d) Tìm điều kiện của tam giác ABC để N là trọng tâm của tam giác AIE.

I/ Circle the sentence or question that has similar meaning to the first one. Question 31: Mary went to Viet Nam last year and it was her second time. A. That was the first time Mary went to Viet Nam. B. That wasn’t the first time Mary went to Viet Nam. C. That was the second time Mary went to Viet Nam. D. That was the last time Mary went to Viet Nam. Question 32: There are many places worth seeing in London. A. There are many places of interest in London. B. There are not many places of interest in London. C. There are no places of interest in London. D. There are many places which interesting in London. Question 33: I want to visit a beautiful beach in Viet Nam. Could you suggest one? A. Do you mind if you suggested one beautiful beach in Viet Nam? B. Would you mind if you suggest one beautiful beach in Viet Nam? C. Do you mind suggesting one beautiful beach in Viet Nam? D. Could you suggested one beautiful beach in Viet Nam? Question 34: Could you help me to send this letter to my boss? A. Would you mind sending this letter to my boss? B. Do you mind send this letter to my boss? C. Would you mind send this letter to my boss? D. Would you mind to send this letter to my boss? Question 35: Yesterday we decided to paddle around West Lake in a canoe. A. We decided to go around West Lake in, a canoe yesterday. B. We decided to walk around West Lake in a canoe yesterday. C. We decided to run around West Lake in a canoe yesterday. D. We decided to ride around West Lake in a canoe yesterday. II/ Choose the best answer. Question 36: I_____ in Jakarta. I've lived here all my life. A. am used to living B. used to living C. use to live D. am used to live Question 37: Jane_____ for the telephone company, but now she has a job at the post office. A. used to working B. used to work C. is used to working D. am used to work Question 38: The Japanese eat a lot of fish and healthy food, ____ they live for a long time A. so B. because C. or D. but Question 39: Lan _________ English for more than a year but she can’t speak it very well. A. learns B. learn C. learned D. has learned Question 40: _____ she was very tired, she helped her brother with his homework. A. Because B. whether C. Although D. so

Giúp em với mng ơi, cảm ơn mng nhiều

Một hội trường hình chữ nhật có chiều rộng bằng 3/5 chiều dài .Trên bản đồ tỉ lệ 1: 500 , chiều dài của hội trường đó đo được 6cm .Tính diện tích hội trường đó .

chứng minh hình ảnh người chinh phụ là biểu tượng đẹp cho phẩm chất phụ nữ việt nam

1. Mục đích của việc phát triển cây công nghiệp lâu năm ở Tây Nguyên nhằm ? 2 . Mục đích phát triển thủy điện ở Tây Nguyên?

A, 7/25:14/5+15/4×1/5= B, 4/5×21/8-1/7:14/5=

Hãy trình bày suy nghĩ về ý kiến sau : Tác phẩm nghệ thuật làm phong phú tâm hồn con người Mn giúp e với ạ e đg cần gấp ạ

II. Read the text and then choose the best answer A, B, C, or D. Visit the Edinburgh Festival Every year, thousands of people come to Edinburgh, the capital city of Scotland, to be part of the Edinburgh Festival. For three weeks every August and September the city is filled with actors and artists from all over the world. They come to Edinburgh for the biggest arts festival in Britain. During this time, the streets of the city are alive with music and dance from early in the morning untill late at night. You can even see artists painting pictures on the streets. Tens of thousands of tourists come to the festival to see new films and plays and to hear music played by famous musicians. This year, you can see over five hundred performances with actors from more than forty countries. The tickets for these performances are quite cheap, and it is usually easier to see your favourite star in Edinburgh than it is in London. So come to Edinburgh next summer! Question 26: How many people come to attend the Edinburgh Festival every year? A. Thousand people B. Thousands of people C. Some people D. Few people Question 27: How long does the Edinburgh Festival last? A. Two months B. Three months C. Three weeks D. For 3 weeks every August and September Question 28: What can you even see artists doing on the streets? A. Playing the guitar on the streets B. Singing songs on the streets C. Painting pictures on the streets D. Dancing on the streets Question 29: How many performances can people see this year? A. Tens of thousands B. Thousands C. Some people D. Over five hundreds Question 30: How much are the tickets for these performances? A. Very cheap B. Very expensive C. Not cheap D. Not quite expensive