Câu 1 : đại não có bao nhiêu vùng ? Em hãy phân biệt và ghi chức năng từng khu Câu 2 : thụ tinh, thụ thai và phát triển thai được thực hiện như thế nào?

Ở 40°C , vi khuẩn E.coli có thời gian thế hệ là 20phút . số lượng tế bào của quần thể ban đầu là 10^6 , sau một thế hệ , số lượng tế bào của quần thể là 64×10^6 . Xác định thời gian để đạt số lượng tế bào đó ?

Cho mk hỏi cách soạn văn lớp 8 với ạ rồi thì soạn hộ mk bài tôi đi học vs ko chép mạng nha

có bao nhiêu người tham gia “Quân khu 3 - 75 năm đồng hành cùng dân tộc

Hoạt động, hoàn cảnh, nguyên nhân Bác Hồ ra đi tìm đường cứu nướcc

Mn giúp em vs ak Lý do : lát phải báo cáo và nộp bài nên cần gấp lắm ạ Mn nhiệt tình giúp em vs

Giúp em phần 3 với ạ em cảm ơnnn

Giúp mình với giúp Giúp mình với giúp Giúp mình với giúp Giúp mình với giúp

I. Tìm từ có phần gạch chận phát âm khác với những từ còn lai.. 1: A. tourist B. anxious C. delicious D. famous 2: A. university B. unit C. discuss D. computer 3: A. fat B. festival C. grand D. man 4: A. rub B. surrounding C. plumber D. husk 5: A. helped B. worked C. asked D. cleaned II: Chọn đáp án đúng. 6: The man ……….. to the principal is my form teacher. A. talks B. talk C. talked D. talking 7: Rice, coffee, fruits and vegetables are Viet Nam’s agricultural …………. A. produce B. production C. products D. productive 8: Thanks for the flowers you sent me while I was in hospital. They helped to cheer me ........ A. over B. up C. on D. in 9: We have lived here ………….. years. A. for B. from C. at D. since 10: She ……… me she didn’t know what to do. A. talked B. told C. said D. spoke 11: Would you mind if I ………….. a photo? A. takes B. take C. took D. taken 12: The …………... festival was held in the communal house yard. A. rice - cook B. rice – cooking C. rice – cooker D. rice – cooked 13: He has worked with the computer …………. early morning. A. for B. from C. since D. until 14: It is dangerous …………… in this river. A. swim B. swam C. swimming D. to swim 15: During his life, Thomas Edison made a lot of …………. A. inventions B. discoveries C. findings D. phone calls 16: Please tell me …………… to get to the bus station. A. why B. which C. what D. how 17: Mary …………… in a small house in the countryside. A. lives B. live C. living D. lived 18: Would you mind putting out you cigarette? ~ ………………. A. No, thanks. B. No, of course not C. No, I wouldn’t. D. No, I don’t. 19: Sa Pa, located in the north of Viet Nam, is a mountainous …………. A. resort B. beach C. wonder D. hotel 20: The train …………. at the station yet. A. didn’t arrive B. hasn’t arrived C. isn’t arriving D. doesn’t arrive III: Đọc đoạn văn và chọn đáp án đúng.. Nick Johnson lives with his parents, and his sister. They lives in Wembley, in north London. Nick’s mom is called Sue. She works in a supermarket. His dad is called Jim and he works in a bank. Nick’s sister is called Tracy. She is nice years old. There is also a dog in the family. His name’s Fred. 21: How many people are there in Nick’s Johnson’s family? A. 2 B. 3 C. 4 D. 5 22: Where does Nick’s family live? A. America B. England C. Scotland D. Australia 23: Which does the word “His” in line 3 refer to? A. Nick’s mother. B. Nick’s sister. C. Nick’s cousin. D. Nick’s dog. 24: What’s Nick’s sister’s name? A. Sue. B. Jim. C. Tracy. D. Fred. 25: Which of the following is not TRUE? A. Nick’s family live in London. B. Nick’s father works in a bank. C. Nick’s mother works in a supermarket. D. Nick’s sister is five years old. IV Tìm lỗi sai. 26: The shop assistant (A) asked (B) Helen whether (C) the shoes was (D) too small for her. 27: We must act now (A) before it is too late (B) doing (C) anything about (D) the problem. 26: Can (A) you tell me (B) what you have done (C) at 8 o’clock yesterday evening (D)? 29: We are (A) looking (B) forward to seeing (C) you on April. 30: I am interesting (A) in the rice - cooking (B) contest (C) you organized (D) yesterday. V. Điền từ thích hợp vào chỗ trống. . Monica Fox is a tennis (31) ………. She started playing tennis (32) ………… she was ten years old. She has traveled to many countries with her parents (33) ………… has won a lot of tournaments. She won her first (34) ………….. in a tournament in 1985. Now she is trying very (35) …………. She (36) ………….. to play at Wimbledon next year. 31: A. player B. playing C. plays D. play 32: A. why B. what C. who D. when 33: A. and B. but C. or D. if 34: A. contest B. prize C. festival D. competition 35: A. hardly B. bad C. badly D. hard 36: A. hopes B. hoped C. hoping D. to hope VI Viết lại câu sao cho nghĩa thay đổi. 37: Columbus discovered America in the 15th century. America …………………………………………………………………………….. 38: I’ve never talked to a more interesting person than him. He is ………………………………………………………………………………….. 39: The United States has a big industry that makes cars. ………………………………………………………………………………………… 40: “Can you help me with my homework, Lan”. Nga asked Lan if ……………………………………………………………………

Cho tam giác abc có 3 góc nhọn,kẻ đg cao AD,BE,CD cắt nhau tại h.a,tam giác AEB đồng dạng tam giác AFC.b,AD.HB=AB. DF giúp mk nhanh lên