vâng, áp dụng cho cả nhịp 3/8

nốt đen : 2 phách

nốt trắng : 4 phách

nốt móc đơn : 1 phách 

nốt móc ghép : 0,5 phách 

nốt lặng đơn : 0,5 phách

nốt lặng đen : 1 phách 

nốt đen : 2 phách

nốt trắng : 4 phách

nốt móc đơn : 1 phách 

nốt móc ghép : 0,5 phách 

nốt lặng đơn : 0,5 phách

nốt lặng đen : 1 phách 

Bài tập đọc nhạc số 7 là bài nào

1 is your sister doing/is skipping

2 were

3 plays/is playing

4 do

5 saw

6 is/speaks/is coming/is staying/is visiting

7 swim

8 living

10 is

1. What is your sister doing now? - She is skipping.

2. There were a lot of people at the party last night.

3. Kate plays volleyball every afternoon, but she is playing badminton now.

4. We should do morning exercise.

5. He saw a big dragon in his dream.

6. Laura is from Canada. She speaks English and French. She will come back to Vietnam tomorrow. She stays in a hotel in HCM for 3 days. She visits a lot of places of interest in Viet Nam

7. My brother can swim.

8. I prefer living in a village because it is peaceful.

9. There is a chair and two tables in the room.

Sao bạn cần gấp lắm thế. Cho tớ một tick nhá

1. doing/is skipping

2. were

3. plays/is playing

4. do

5. saw

6. is/speaks/is going to come/is going to stay/is going to visit

7. swim

8. living

9. is

-Tham khảo c9-10

CTPT: C_nH_2n

PTHH: C_nH_2n + HCl --> C_nH_2n+1Cl

=> \(\%Cl=\dfrac{35,5}{14n+36,5}.100\%=45,223\%\)

=> n = 3

=> CTPT: C₃H₆

=> B

B

My mother used to work at a restaurant 3 years ago but now she doesn't

He used to be the president of Student Union but now he isn't

There used to be many trees - lined in my hometown but now there is none of them

My husband didn't use to do homework but now he does

Children didn't use to play with high-tech devices at an early age

1. My mom used to work at a restaurant

2. He used to be the president of Student Union

3. There used to be many tree-lined street in my hometown.

4. My husband didn't use to do the housework.

5. The children didn't use to play with high-tech devices.

My mother used to work at  restaurant three years ago.

 He used to be the president of Student Union.

There used to be many tree-lined streets in my hometown.

My husband didn't use to do  housework.

childrent didn't use to play with high-tech devices at an early age.  

Bạn phải cho x-y mới tìm đc

\(x+y=3\Rightarrow\left(x+y\right)^2=9\Rightarrow x^2+y^2+2xy=9\)

\(\Rightarrow5+2xy=9\Rightarrow xy=2\)

\(\Rightarrow\left(x-y\right)^2=x^2+y^2-2xy=5-2.2=1\)

\(\Rightarrow x-y=\pm1\)

\(A=\left(x-y\right)\left(x^2+y^2+xy\right)=\pm1.\left(5+2\right)=\pm7\)

B

4, were

5, was

6, were

7, was

8, were

9, was

10, were

11, were

12, was

13, was

14, was

4.was

5.was

6.were

7.was

8.were

9.was

10.were

11.were

12.was

13.was

14.was