Giúp e với ạ, e cảm ơn
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1 had worked - went - is travelling
2 do you do - worked
3 had gone
4 got - had gone
5 met - hadn't seen
6 was making
7 is having
8 is making - makes
9 am wearing
10 is reading
11 borrows - remembers
12 is he doing - think - is polishing
13 saw - was painting
14 was reading
15 went
16 was discovered
17 drinks - drank
18 does she do - plays - watches
19 are waiting
20 had left
\(CuO+H_2\underrightarrow{^{t^0}}Cu+H_2O\)
=> Phản ứng thế
\(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)
=> Phản ứng hóa hợp
\(Cu\left(OH\right)_2\underrightarrow{^{t^0}}CuO+H_2O\)
=> Phản ứng phân hủy
\(3Fe+2O_2\underrightarrow{^{t^0}}Fe_3O_4\)
=> Phản ứng hóa hợp
\(2KClO_3\underrightarrow{^{t^0}}2KCl+3O_2\)
=> Phản ứng phân hủy
\(Ba+2H_2O\rightarrow Ba\left(OH\right)_2+H_2\)
=> Phản ứng thế
\(Mg+2HCl\rightarrow MgCl_2+H_2\)
=> Phản ứng thế
23 Has Nga read
24 Have they played
25 Have - already washed
26 Is -travelling
7 makes
8 started
9 are - are playing
cái này áp dụng hệ thức lượng thôi bạn
AH=căn 6^2-4,8^2=3,6cm
=>AC=6^2/3,6=10cm
1. bag
2. bunch
3. slice
4. box
5. piece
6. carton
7. can
8. bowl
9. jar
10. bottle
Bài làm của tớ:
1. stops
2. has read - have...read
3. are putting
4. did...do
5. has finished
6. has just seen
7. have already shown
8. have just sold
9. did... buy
10. bought