Ai giúp e vs mai e thi rồi mà e ko bt làm
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1 A
2 C
3 C
4 C
5 B
5 C
5 B
6 A
C
I
1 - C
2 - D
3 - B
4 - A
II
1 People of ethnic minorities
2 In March of every year
3 Money and other things
4 No, they aren't
5 Around all the villages
D
1 play volleyball
2 are 50 teachers and 800 students in my school
3 terrible weather
4 works fewer hours than ,e
II
1 performance
2 cultural
3 seasonal
4 carelessly
không có mẹo gì cả, chỉ có cần bạn ôn thì làm bài sẽ tốt thôi ^^
II Grammar and....
choose the correct answer
3.D
4.A
5.B
6.C
7.C
8.C
C.Reading
read the...
1.B
2.C
3.D
4.B
\(A=\left(2+2^2+2^3+2^4+2^5+2^6\right)+...+\left(2^{2017}+2^{2018}+2^{2019}+2^{2020}+2^{2021}+2^{2022}\right)\\ A=\left(2+2^2+2^3+2^4+2^5+2^6\right)\left(1+...+2^{2017}\right)\\ A=126\left(1+...+2^{2017}\right)⋮42\left(126⋮42\right)\)
\(R_{tđ}=R_1+R_2+R_3=6+12+20=38\Omega\)
\(I_3=I=\dfrac{U}{R}=\dfrac{36}{38}=\dfrac{18}{19}A\)
\(U_2=I_2\cdot R_2=\dfrac{18}{19}\cdot12=\dfrac{216}{19}V\)
\(P=U\cdot I=36\cdot\dfrac{18}{19}=\dfrac{648}{19}W\)
\(A=P\cdot t=\dfrac{648}{19}\cdot30\cdot60=61389,5J\)
\(MCD:R1ntR2ntR3\)
\(=>R=R1=R2=R3=6+12+20=38\Omega\)
\(=>I=I1=I2=I3=U:R=36:38=\dfrac{18}{19}A\)
\(=>U2=I2\cdot R2=\dfrac{18}{19}\cdot12=\dfrac{216}{19}V\)
\(=>A=UIt=36\cdot\dfrac{18}{19}\cdot\dfrac{30}{60}=\dfrac{324}{19}\)Wh