tặng bạn nhân dịp tết

Góc x'Oy' = góc xOy = 70^ovì 2 góc đối đỉnh thì bằng nhau.

vì \(\stackrel\frown{X'OY'}\)

đối đỉnh với \(\widehat{XOY}\)

nên \(\widehat{X'OY'=70^o}\)

Chất đặc trưng là những chất phức tạp mà cơ thể không hấp thụ được.Ví dụ như lipit, protein, tinh bột,...

-Phân giải chất đặc trưng:

+Tinh bột chuyển hóa thành đường đôi khi tiếp xúc với enzim amilaza trong khoang miệng.

+Lipit chuyển hóa thành các axit béo khi tiếp xúc enzim lipaza trong ruột non

-Nói chung, chuyển hóa là hoạt động phân giải các chất phức tạp thành các chất đơn giản mà cơ thể hấp thụ được :>>

P/s: Mông lung như một trò đùa :v

Câu hỏi của bạn mông lung quá ạ :<

<Bạn tự tóm tắt nha>

MCD RntRntR

Số chỉ vôn kế ở 2 đầu đèn 1 và đèn 2

\(U_{12}=U_1+U_2\)

Số chỉ vôn kế của 2 đầu đèn 2 và đèn 3

\(U_{23}=U_3+U_2\)

Vì đây là mạch nối tiếp nên I=I1=I2=I3

mà các đèn giống nhau nên

\(U_1=U_2=U_3=a\)

Lập tỉ lệ ta dc:\(\dfrac{U_{12}}{U_{23}}=\dfrac{U_2+U_1}{U_2+U_3}=\dfrac{a+a}{a+a}=1\Rightarrow U_{12}=U_{23}\)

Vậy số chỉ của 2 vôn kế là bằng nhau

Viết lại bài với chính xác tương đối (không mắc lỗi nghiệm trọng)

My best friend is Thanh An. We came to the same Archimedes School, and we have been friends for 1 year. Thanh An is not short and not tall, he has a normal height. He had a short black hair and a big black eyes. He is very kind and smart, especially in Math. He is funny too, he makes me laugh even when I feel bad. I like to be friends with him. Because he is very smart at Math, we created a Zalo group to do our homework. I will tell you my secret: I sometimes copy his Math homework too (HAHAHA). I hope that I can be friends with him forever.

1. I can't help you because I am very busy now.

2. He stayed at home last Friday as it rained heavily.

3. Since it is very hot, we turn on all the fans.

4. The students learn English very badly because it is very difficult.

5. As Miss Dung is very kind, many people like her.

6. We can do the excercises quickly since they are very easy.

7. Because they didn't review the lessons carefully, they didn't do the test wel..

8. As they are in a hurry, they can wait for you.

9. Nam didn't go to school on time since he got up late.

10. Because her clothes are old, she has to buy some new ones.

11. As your shoes are very dirty, you should put them in the corner of the room. 

12. We went to the seaside for the weekend since the air in the city was not fresh.

13. These pupils often get bad marks because they are very lazy.

14. As the play was very long, we went home before the end.

1. I can't help you because/since/as I am very busy now

2. He stayed at home last Friday because/since/as it rained heavily

3. We turn on all the fans because/since/as it is very hot

4. The students learn English badly because/since/as it is very difficult

5. Many people like Miss Duong because/since/as she is very kind

6. We can do the exercises quickly because/since/as they are very easy

7. They didn't do the test well because/since/as they didn't review the lessons carefully

8. They can't wait for you because/since/as they are in a hurry

9. Nam didn't go to school on time because/since/as he got up late

10. She has to buy some new clothes because/since/as her ones are old

11. You should put your shoes in the corner of the room because/since/as they are very dirty

12. We went to the seaside for the weekend because/since/as the air in the city was not fresh

13. These pupils often get bad marks because/since/as they are very lazy

14. We went home before the end because/since/as they play was very long

Có ^^

KB khum

a) Ta có: \(\dfrac{3}{2}\sqrt{12}+\sqrt{75}-\sqrt{300}+\sqrt{27}\)

\(=3\sqrt{3}+5\sqrt{3}-10\sqrt{3}+3\sqrt{3}\)

\(=\sqrt{3}\)

b) Ta có: \(\sqrt{14-6\sqrt{5}}+\sqrt{9-4\sqrt{5}}\)

\(=3-\sqrt{5}+\sqrt{5}-2\)

=1