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15 tháng 10 2017

1 what did sout nut's mother make litter pea do all day

2what did bao's grandma told him after dinner

3 how many cigarettes a day did your grandfather use to smoke

4when

3 tháng 7 2021

1 have been working

2 arrived 

3 was told 

4 was

5 was

6 asked 

7 said

8 hadn't been

9 had 

10 keeping

11 walked

12 will have participated

13 haven't met

14 wondered 

15 had heard

16 asked 

17 had done

18 said

19 had dropped

20 looked

3 tháng 7 2021

Cảm ơn anh

10 tháng 7 2021

1 D (phát âm là id còn lại là d)

2 C (phát âm là k còn lại là ch)

3 B (câm còn lại đọc là b)

4 A (đọc là g còn lại là z)

10 tháng 7 2021

Tiện thể giải thích cho hết luôn đây

II,

1D (/t/ còn lại theo nhóm các âm ko theo qt)

2C (/c/ còn lại là /ch/)

3B (âm câm, còn lại là /b/)

4A (/g/ còn lại là /z/)

III,

1D: cấu trúc spend+V-ing

2A: cụm từ native speakers

3C: thì quá khứ hoàn thành tiếp diễn

4D: lời khen và lời cảm ơn

5 tháng 10 2021

chụp sáng và rõ hơn nhé

5 tháng 10 2021

có hiêủ đuơcj đâu mà trả lơì

27 tháng 1 2022

1B

2A

3B

4B

5D

6A

7B

8B

9D

10B

1 are

2 taught

3 will be - makes

4 is sleeping

5 building (dream of Ving: mơ ước được làm gì)

Có ai bt lm bài này k giúp mk vs mk đng rất rất cần mong các bn giúp cho II/ Change the following sentences from active into passive form.(Chuyển sang bị động) 1.Do they teach English here? ……………………………………………………………………… 2.Will you invite her to your wedding party? …………………………………………………………………… 3.Did the teacher give some exercise?...
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Có ai bt lm bài này k giúp mk vs mk đng rất rất cần mong các bn giúp cho II/ Change the following sentences from active into passive form.(Chuyển sang bị động) 1.Do they teach English here? ……………………………………………………………………… 2.Will you invite her to your wedding party? …………………………………………………………………… 3.Did the teacher give some exercise? …………………………………………………………………… 4.Are the police making inquires about the thief? …………………………………………………………………… 5.Must we finish the test before ten? …………………………………………………………………… 6.Had buses brought the children home? …………………………………………………………………… 7. When will you do the work? …………………………………………………………………… 8. How many days did she spend finishing the work? …………………………………………………………………… 9. How long have they waited for the doctor? …………………………………………………………………… 10. What time can the boys hand in their paper? ……………………………………………………………………

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Có ai bt lm bài này k giúp mk vs mk đang rất rất cần mong các bn giúp cho II/ ChooseA, B, C, D for each gap in the following sentences 3. Osaka has become one of the...........​“liveable" city in Asia. A. more B. better​ C. much D. most 4.The traditional craft has​​from generation to generation.​ A. passed down B. passed​ C. been passed down D. been passed by 5.The Van Phuc producers silk have expanded their silk garment goods​​they can satisfy the varied demand...
Đọc tiếp

Có ai bt lm bài này k giúp mk vs mk đang rất rất cần mong các bn giúp cho II/ ChooseA, B, C, D for each gap in the following sentences 3. Osaka has become one of the...........​“liveable" city in Asia. A. more B. better​ C. much D. most 4.The traditional craft has​​from generation to generation.​ A. passed down B. passed​ C. been passed down D. been passed by 5.The Van Phuc producers silk have expanded their silk garment goods​​they can satisfy the varied demand for their silk. A. in order to B. despite​ C. because D. so that 6. ___________ they moved to the city five years ago, they still remember living in a small town. A. Although B. Whereas​ C. While D. In order that 7.This company has gone bankrupt. Do you know who will_________ ? A. take care of it B. look after it​ C. take it over D. turn it up 8.The people in my village cannot earn enough money for their daily life. They can't______ this traditional craft. They have to find other jobs. A. help out​ B. live on​ C. work on​ D. set up 9 .Peter and Jane said to me: “Our wedding will be held next week”. A.Peter and Jane said to me that my wedding would be held next week. B.Peter and Jane said to me that their wedding would be held the next week. C.Peter and Jane said to me that their wedding would be held the following week D. Peter and Jane said me that their wedding would be held the following week

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18 tháng 9 2021

ChooseA, B, C, D for each gap in the following sentences 3. Osaka has become one of the...........​“liveable" city in Asia. A. more B. better​C. much D. most 4.The traditional craft has​​from generation to generation.​A. passed down B. passed​C. been passed down D. been passed by 5.The Van Phuc producers silk have expanded their silk garment goods​​ they can satisfy the varied demand for their silk. A. in order to B. despite​C. because D. so that 6. ___________ they moved to the city five years ago, they still remember living in a small town. A. Although B. Whereas​C. While D. In order that 7.This company has gone bankrupt. Do you know who will_________ ? A. take care of it B. look after it​C. take it over D. turn it up 8.The people in my village cannot earn enough money for their daily life. They can't______ this traditional craft. They have to find other jobs. A. help out​B. live on​C. work on​D. set up 9 .Peter and Jane said to me: “Our wedding will be held next week”. A.Peter and Jane said to me that my wedding would be held next week. B.Peter and Jane said to me that their wedding would be held the next week. C.Peter and Jane said to me that their wedding would be held the following week D. Peter and Jane said me that their wedding would be held the following week

18 tháng 9 2021

Thank you so much

AH
Akai Haruma
Giáo viên
16 tháng 3 2022

Lời giải:

a. Khi $m=-4$ thì hpt trở thành:

\(\left\{\begin{matrix} 2x+y=-14\\ x-y=5\end{matrix}\right.\Leftrightarrow \left\{\begin{matrix} x=-3\\ y=-8\end{matrix}\right.\)

b. 

PT $(2)\Leftrightarrow x=y+5$

Thay vô PT(1):

$2(y+5)+y=3m-2$

$\Leftrightarrow 3y+10=3m-2$

$\Leftrightarrow 3y=3m-12$

$\Leftrightarrow y=m-4$

$x=y+5=m+1$

Vậy hpt có nghiệm $(x,y)=(m+1, m-4)$

Để $x+y=13$

$\Leftrightarrow m+1+m-4=13$

$\Leftrightarrow 2m-3=13$

$\Leftrightarrow m=8$

Bài 1:

Gọi A là kim loại hóa trị II cần tìm

\(n_{H_2}=\dfrac{0,28}{22,4}=0,0125\left(mol\right)\\ A+2HCl\rightarrow ACl_2+H_2\\ n_A=n_{H_2}=0,0125\left(mol\right)\\ M_A=\dfrac{0,3}{0,0125}=24\left(\dfrac{g}{mol}\right)\)

Vậy: Kim loại A(II) cần tìm là Magie (Mg=24)

Bài 2:

- Chỉ có Zn tác dụng với dd HCl dư chứ Cu thì không.

\(n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\\ Zn+2HCl\rightarrow ZnCl_2+H_2\\ n_{Zn}=n_{H_2}=0,2\left(mol\right)\\ \rightarrow m_{Zn}=0,2.65=13\left(g\right)\\ \rightarrow m_{Cu}=15-13=2\left(g\right)\\ Vậy:m=2\left(g\right)\)