có ai 2k7 trở lên vô làm quen đc hông ạ
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TT
Tuấn Thunderstorm
16 tháng 12 2020
Tui nè 21\11\2k7
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TT
Tuấn Thunderstorm
16 tháng 12 2020
Kết bạn nhé
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15 tháng 12 2020
I. Complete the sentences using the words in bold. Use two to five words.
1. Your mother’s worried about you. You should phone her. better
You would better phone your mother as she’s worried about you.
2. Will you ever think about finding a flat of your own? time
It’s time to think about finding a flat of your own.
4. This summer, I would rather book a holiday in Monaco than Lyons. prefer
This summer, I prefer a holiday in Monaco rather to Lyons.
5. Why didn’t you tell me yourself that you were leaving? rather
I’d rather tell me yourself that you were leaving.
6. .She wants to be more lik e her mother wishes ( câu này hôm sau mình mới đc học )
She wishes that wanted to be more her mother.
7. I should have taken that job in Canada last year. only
If only I had taken that job in Canada last year.
8. You should have checked the oil before you set out. better
It would better you had checked the oil before you set out
15 tháng 12 2020
I. Complete the sentences using the words in bold. Use two to five words.
1. Your mother’s worried about you. You should phone her. better
You would better phone your mother as she’s worried about you.
2. Will you ever think about finding a flat of your own? time
It’s time to think about finding a flat of your own.
4. This summer, I would rather book a holiday in Monaco than Lyons. prefer
This summer, I prefer a holiday in Monaco rather to Lyons.
5. Why didn’t you tell me yourself that you were leaving? rather
I’d rather tell me yourself that you were leaving.
6. .She wants to be more lik e her mother wishes ( câu này hôm sau mình mới đc học )
She wishes that wanted to be more her mother.
7. I should have taken that job in Canada last year. only
If only I had taken that job in Canada last year.
8. You should have checked the oil before you set out. better
It would better you had checked the oil before you set out
DT
20 tháng 12 2020
Theo GT, ta có :
p + n + e = 28
Mà p = e
\(\Rightarrow\)2p + n = 28 (1)
Hạt không mang điện là hạt n
\(\Rightarrow\)n = 35% . 28 = 10 (2)
(1)(2) \(\Rightarrow\)p = e = 9
Sơ đồ cấu tạo nguyên tử
Hạt p Hạt n Hạt e
-----------------------------
Chúc Bạn Học Tốt :)))
15 tháng 12 2020
a, \(\frac{5}{2}x^2y^2+15x^2y-30xy^2=5xy\left(\frac{1}{2}xy+3x-6y\right)\)
b, \(16x^2+24x-8xy-6y+y^2\)
\(=\left(16x^2-8xy+y^2\right)+\left(24x-6y\right)=\left(4x-y\right)^2+6\left(4x-y\right)\)
\(=\left(4x-y\right)\left[\left(4x-y\right)+6\right]=\left(4x-y\right)\left(4x-y+6\right)\)
c, \(2x^2-5x-7=2x^2-7x+2x-7\)
\(=2x\left(x+1\right)-7\left(x+1\right)=\left(2x-7\right)\left(x+1\right)\)
15 tháng 12 2020
Bai lam
\(4\left(x^2-2\right)=0\Leftrightarrow x^2-2=0\)
\(\Leftrightarrow x^2=2\Leftrightarrow x=\pm\sqrt{2}\)