so sánh tuyến nội tiết và tuyến ngoại tiết .Cho ví dụ.Nêu tính chất và vai trò của hoocmon

Tính thể tích không khí cần dùng để đốt cháy hoàn toàn 7 g anken

b) Kẻ HD AB (D AB) , HE BC (E BC): Chứng minh HD= HE. Giúp mik vs plsss

IV. Read the passage and decide which statements are true (T) or false (F). David lives in the countryside in Canada. He usually gets up early and does morning exercises with his bike. He rides around his area. After breakfast, he takes a bus to school. He has lessons from 9am to 1.pm. He often has lunch in the school canteen and then he has a short rest. In the afternoon, he has lesson in the library or PE in the gym. After school, he often goes to the sports center near his house and plays basketball or table tennis. In the evening, he often does his homework. Sometimes he surfs the Internet for his school projects. He often goes to bed early. 1. David lives in the countryside in Canada. 2. He often rides a bike in the morning 3. His classes starts at 1 o’clock in the afternoon 4. In the afternoon, he continues with his lessons at school 5. He plays basketball or tennis in the school gym 6. He sometimes surfs the net for his school projects V. Read the passage and decide which statements are true (T) or false (F). This writing is about my best friend, Mai. We got to the same school and we’ve been together for three years. Mai is very pretty. She has short black hair and big brown eyes. She is clever and hard-working but she is also very funny. She makes jokes and we all laugh. She loves reading and writing short poems. I like being with her. We often do our homework together and she helps me a lot. I also like her because she knows a lot about astronomy and we can chat about it for hours. At the moment we’re making a Space mini book. We’re doing a lot of searching on the Internet. This Saturday, we’re going to the National Museum to take some photos for our project. Then we’re watching a new film on the Disney channel together. It’s going to be fun! 1. Phuc and Mai are studying in the same school 2. Mai has long black hair and big eyes 3. She is hard working and funny 4. She likes writing short stories 5. Phuc and Mai are making a mini book on Geography now 6. They search for information in library books 7. They are going to the museum to take photos for their project 8. After that they will go to the cinema together

Trong công nghiệp, khí oxi được điều chế từ nguyên liệu nào? * 1 point KMnO4 hoặc KNO3. Không khí hoặc KMnO4. Không khí hoặc nước. KMnO4 hoặc KClO3.

Vẽ giúp mik 4 bức về siêu đạo chích kid với (nhớ tô màu và ko sao mạng) hứa cho 5* +cảm ơn

Giải các pt: (x + 3)^2.(2x + 5)= 32

Đốt cháy hoàn toàn 1,12 lít một Anken X (dktc) thu được 5,60 lít khí co2 (dktc). CTPT X là

Tìm X,Y E Z biết (x +3).(2y-1) = 5

Trong các dãy hợp chất sau, dãy nào là oxit bazo? * 1 point CaO, Fe2O3, Na2O, Al2O3 CaO, KOH, SO3 , Fe2O3 CO2, SO3, CaO , Fe2O3 KOH, SO3, CaO, Na2O