MN giúp mk với mk cảm ơn ạ
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6. They would rather Nam didn't smoke in the office.
7. You should practice speaking English every day.
8. What did you talk to him last night?
9. It isn't easy to learn English in a short time.
20. Your room is larger and more comfortable than ours.
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\(9,=\dfrac{\sqrt{5}+1-\sqrt{5}+1}{\left(\sqrt{5}-1\right)\left(\sqrt{5}+1\right)}=\dfrac{2}{4}=\dfrac{1}{2}\\ 10,=\dfrac{\sqrt{5}+2+\sqrt{5}-2}{\left(\sqrt{5}-2\right)\left(\sqrt{5}+2\right)}=2\sqrt{5}\\ 11,=\dfrac{8+6\sqrt{2}-8+6\sqrt{2}}{\left(4-3\sqrt{2}\right)\left(4+3\sqrt{2}\right)}=\dfrac{12\sqrt{2}}{-2}=-6\sqrt{2}\\ 12,=\dfrac{2+\sqrt{6}+2-\sqrt{6}}{\left(2-\sqrt{6}\right)\left(2+\sqrt{6}\right)}=\dfrac{4}{-2}=-2\\ 13,=\sqrt{2}-1+\sqrt{2}+3=2\sqrt{2}+2\\ 14,=2-\sqrt{3}+\sqrt{3}-1=1\\ 15,=3-\sqrt{5}+\sqrt{5}-2=1\)
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Ex1 ko có verb à
Ex2
1 like
2 listen
3 wears
4 teaches
5 do
6 goes
7 comes
8 goes
9 watch
10 walks
11 is
12 washes
13 studies
14 wants
15 plays
16 buys
17 studies
18 tries
19 washes
20 cries
21 says
22 flies
23 don't have
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a computer is used to do that job nowadays
He will be seen off at the airport by all his friends
Beer used to be drunk for breakfast in England years ago
Tea can not made with cold water.
the floor was being cleaned when i arrived
Should Julia be helped with the sewing ?
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Một gen có 2400 nucleotit ⇒ N = 2400 Nu
⇒ Số chu kì xoắn là:
C = N : 20 = 2400 : 20 = 120 (chu kì)