3.Joanna bought these gifts herself.

4.If you want more to eat,defend yourselves ,children.

chúc mừng các bn nha

1. Knowing English is very useful => It IS VERY USEFUL TO KNOW ENGLISH

2. It started to snow at 5 o'clock => It HAS STARTED SNOWING AT 5 O'CLOCK.

3.Nam is taller than Hung - HUNG IS SHORTER THAN NAM

4.When did you go to bed last night ? => What at timE DID YOU GO TO BED LAST NIGHT ?

5.What time does Nam have to leave ? => Do you know WHAT TIME NAM HAS TO LEAVE ?

6.To do morning exercises is good => It IS GOOD TO DO MORNING EXERCISES .

7.This book is very boring and so is that one => This book is as BORING AS THAT BOOK.

8. will it be necessary for me to sleep under a net ? => Shall I have to SLEEP UNDER A NET ?

9.. I last read a book on September 20th => I haven't READ THAT BOOK SINCE SEPTEMBER 20TH.

10. An began to be interested in healthy eating 3 years ago => An have been INTERESTED IN HEALTHY EATING FOR 3 YEARS.

(n;n+10)=(10;n) n=1;2;5;10

vậy có 4 năm nhá

Tôi quan tâm đến nhạc jazz bởi vì nó là tuyệt vời như vậy

\(\frac{a}{b}=\frac{c}{d}\)

=> \(\frac{a}{c}=\frac{b}{d}\)

=> \(\frac{5a}{5c}=\frac{3b}{3d}=\frac{5a+3b}{5c+3d}=\frac{5a-3b}{5c-3d}\)

Gọi x là hóa trị của Fe

CTPT :FeCl_x

Fecl_{x +} xAgNo_{3 \(\rightarrow\)} xAgCl \(\downarrow\) + Fe\(\left(NO_3\right)_x\)

\(\left(56+35,5x\right)g\) 143,5x\(\left(g\right)\)

1g 2,65g

Ta cso tỷ lệ :

\(\dfrac{56+35,5x}{1}=\dfrac{143,5x}{2,65}\) \(\Rightarrow x=3\)

Vậy Fe có họa trị III

\(\Rightarrow\) Công thức cảu sắt clorua là : FeCl ₃

FeCl₃ + 3AgNO₃ \(\rightarrow3AgCl\) \(\downarrow\) +Fe\(\left(No_3\right)_3\)

bác tài xế qua còn xe ở lại

Tên : Lương hằng

Lớp : 7

Link của nick : https://hoc24.vn/vip/anhanhcute

Tên: lương thị hằng
Lớp: 7a
Link của nik: https://hoc24.vn/vip/anhanhcute