1.I think you ought to give up playing video games. (should)

-->I think you should give up playing video games.

2.It's necessary for me to finish the work on time. (have to)

--->I have to finish the work on time.

3.It wasn't necessary for you to clean that car. (have to)

--->You didn't have to clean that car.

4.It was quite unnecessary for you to adopt a green lifestyle. (have to)

---->You didn't have to adopt a green lifestyle.

5.It was careless of you to leave the windows open last night. (shouldn't)

----->You shouldn't have left the windows open last night.

6.It is advisable for each member in the family to share the housework equally. (should)

---->Each member in the family should share the housework equally.

7.You are required to come back home before 10 p.m. (must)

--->You must come back home before 10 p.m.

8.Lina is advised to prepare carefully in the morning. (should)

----->Lina should prepare carefully in the morning.

9.Tu is responsible for picking up litter. (have to)

------>Tu has to pick up litter.

1.You are required to ask your parents for permission before staying out late. (must)

You must ask your parents for permission before staying out late.

2.I think you ought to give up smoking immediately. (should)

I think you should give up smoking immediately.

3.It is not a good idea for me to stay up late. (shouldn't)

I shouldn't stay up late.

4.It wasn't necessary for you to send these letters. (have to)

You didn't have to send these letters.

5.It was unnecessary for Tim to finish the work. (have to)

Tim didn't have to finish the work.

6.It was careless of you to leave your children alone at home. (shouldn't)

You shouldn't have left your children alone at home.

Bằng 1 cách nào đó 1 câu hỏi từ 2023 ở đây và tôi vẫn trả lời nó sau 1 năm :v

1 The distance  from my home to  school is about 3 km

2 My mum used to live in a small village when she was small
3 Despite being a millionaire , he lives in a small flat 
4 when does the festive take place ?
5 It is about two kilometres from my home to school
6 he didn't use to ride his bike to school 
7 Despite having a test tomrrow , they are still watching TV now 

\(b,\text{PT hoành độ giao điểm: }-2x=3x+3\\ \Leftrightarrow x=-\dfrac{3}{5}\Leftrightarrow y=\dfrac{6}{5}\\ \Leftrightarrow A\left(-\dfrac{3}{5};\dfrac{6}{5}\right)\)

Câu 2: 
Theo đề, ta có hệ phương trình:

\(\left\{{}\begin{matrix}a+b=1\\4a+b=-2\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}-3a=3\\a+b=1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=-1\\b=1-a=2\end{matrix}\right.\)

Phần tự luận bạn tách ra giùm mình nhé, làm trắc nghiệm thoi =))

1. B

2. A

3. C

1. Bạn xem lại giúp mình nhé, tại tính R mà đơn vị lại là V???

2. D

Bài 1:

\(n_{CuO}=\dfrac{56}{80}=0,7\left(mol\right)\)

PTHH: CuO + 2HCl → CuCl₂ + H₂O

Mol:      0,7       1,4

\(m_{ddHCl}=\dfrac{1,4.36,5.100}{14,6}=350\left(g\right)\)

Bài 2:

\(n_{Na_2SO_3}=\dfrac{12,6}{126}=0,1\left(mol\right)\)

PTHH: Na₂SO₃ + 2HCl → 2NaCl + SO₂ + H₂O

Mol:         0,1                                      0,1

\(V_{SO_2}=0,1.22,4=2,24\left(l\right)\)

toàn hỏi mấy cái này:)

tuổi dậy thì đó ba

Vì   

    Cơ thể tiết ra hormon sinh dục cũng khiến cơ quan sinh dục của bé phát triển to lên. Cơ thể bắt đầu mọc nhiều lông ở vùng kín. Đối với các bé gái, dậy thì là giai đoạn có những biến đổi lớn trong sinh lý, chuẩn bị hoàn thiện khả năng thụ thai và sinh con.

     Tham khảo