mn giúp mik nhanh với nha
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L
1
28 tháng 10 2021
bữa sau bạn nhớ giải thích nữa nha chớ mình không biết tại sao ra đáp án đó đâu
DC
2
NM
2
10 tháng 11 2021
TL:
Hai đường thẳng song song không bao giờ cắt nhau
-HT-
!!!!!1
BC
4
16 tháng 10 2020
1. I have a new car
2. Do you have a book?
3. I have an apple
4. We have made a lot of mistakes
5. We have made a lot of mistakes
6. I only have to think of a sentence.
7. I only have to take one suitcase on the train.
8. I only have to feed fish to the penguins.
9. I have two apples
10. You have beautiful eyelashes
16 tháng 10 2020
10 ví dụ have là:
do the boys have a football match?
do the girls have a big dinner?
does the girl have short hair?
Does he have yellow hair
do you have nice eyes?
Does she have a round face?
do you have long black hair?
Does the dog have a long tail?
Do they have a glasses?
4 tháng 12 2021
\(\left\{{}\begin{matrix}\widehat{OAB}=\widehat{ODC}\left(AB\text{//}CD\right)\\\widehat{OBA}=\widehat{OCD}\left(AB\text{//}CD\right)\\AB=CD\end{matrix}\right.\Rightarrow\Delta OAB=\Delta OCD\left(g.c.g\right)\\ \Rightarrow OA=OD;OB=OC\)
9D
1
21 tháng 10 2021
\(a,=\dfrac{\sqrt{2}\left(1+\sqrt{2}\right)}{1+\sqrt{2}}=\sqrt{2}\\ b,=\dfrac{\sqrt{5}\left(\sqrt{3}-1\right)}{\sqrt{3}-1}=\sqrt{5}\\ c,=\dfrac{\sqrt{3}\left(1-\sqrt{2}\right)}{2\left(\sqrt{2}-1\right)}=-\dfrac{\sqrt{3}}{2}\\ d,=\dfrac{\sqrt{5}\left(1-\sqrt{2}\right)}{\sqrt{3}\left(1-\sqrt{2}\right)}=\dfrac{\sqrt{5}}{\sqrt{3}}=\dfrac{\sqrt{15}}{3}\\ e,=\dfrac{\sqrt{7}\left(\sqrt{7}+1\right)}{\sqrt{7}+1}=\sqrt{7}\\ f,=\dfrac{\sqrt{5}\left(\sqrt{5}+1\right)}{\sqrt{5}+1}=\sqrt{5}\\ g,=\dfrac{\sqrt{2}\left(\sqrt{5}-1\right)}{\sqrt{5}-1}=\sqrt{2}\\ h,=\dfrac{\sqrt{5}\left(\sqrt{3}-1\right)}{\sqrt{3}-1}=\sqrt{5}\)
B
Ex2
2 It is a library
3 It is a railway station
4 It is a gym
5 It is a square
6 It is an art gallery
Ex3
1 colder
2 more dangerous
3 more important
4 narrower
5 faster
Ex4
1 than he used to be
2 than it was when I bought it
3 she was a child
4 than I was before
5 than they were ten years ago