"Why is Hoa not lazy?" hay "Why is not Hoa lazy?" là đúng.
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27 tháng 12 2021 lúc 21:11
45. Hoa is a ___________ grade 7 student- not lazy at all. (type)
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a) Why do some people think that students have an easy life?
b) How many hours a week does Hoa work? Is this fewer than most workers?
c) How many hours s week do you work? Is that more or fewer hours than Hoa?
d) Does the writer think student are lazy?
Xin lỗi nhưng mik chưa hiểu ý bài này
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15 tháng 8 2020 lúc 14:00
Answer the questions:
Is pizza popular? Why or why not?
Is fast food healthy? Why or why not?
Are vegetable bad? Why or why not?
Is fast food expensive? Why or why not?
Help me please! ! ! !
1.Yes,it is because pizza is delicious,blended by simple ingredients
2.Yes,it is because clean vegetables is good for health
3.No,it isn'y because vegetables is good and clean for health everyone
4.No,it isn't because vegetables is cheap for somebody
Tịks nhé!Học tôta!:))
Pizza is popular may because it is tasty and totally has almost all nutrients in one sausage, pineapple, chicken, onion, pepper, cheese,corn, tomato...
Fast food are unhealthy because it can cause memory problems,lead to fatigue and depression,....and important are it will make your stomach bigger and your wallet smaller soon.
Vegetable are really good because its good effect on the intestinal tract and digestive system,body purification,..
In Vietnam , fast food may be expensive but in foreign, it is really cheap, the proof is they eat it usually and it is tasty too.
Em hãy tìm và chữa lỗi trong những câu sau (Mỗi câu có 01 lỗi):
1. My school is bigger than Hoa.
2. She is lazy, but her brother is very lazier
3. Playing is more interesting than study
4. Mary is the most beautiful of the twins
5. These exercises are not more difficult than those ones
1. My school is bigger than Hoa.
2. She is lazy, but her brother is very lazier = lazy
3. Playing is more interesting than study = studying
4. Mary is the most beautiful of the twins
5. These exercises are not more difficult than those ones = this one
1. Hoa -> Hoa's
2. bỏ very
3. study -> studying
4. most -> more
5. Câu này sửa cả câu: These exercises are not as difficult as those ones.
1. My school is bigger than Hoa. \(\rightarrow\)Hoa's school
2. She is lazy, but her brother is very lazier. \(\rightarrow\varnothing\)
3. Playing is more interesting than study. \(\rightarrow\)studying
4. Mary is the most beautiful of the twins. \(\rightarrow\)more
5. These exercises are not more difficult than those ones. \(\rightarrow\)as difficult as
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26 tháng 5 2022 lúc 9:43
1. He/ wil/ good/ dancing
=>
2. She/ not be/ interested in/ watch/ foodball match
=>
3. Why/ not/ we/ plant trees/ around our houses/ get shade/ fresh air?
=>
4. We/ put/ garbage bins/ the schoolyard/ prevent/ lazy student/ throw trash
=>
1. He will be good at dancing.
2. She isn't interested in watching football matches.
3. Why don't we plant trees around our houses to get shade and fresh air?
4. We put garbage buns in the schoolyard to prevent lazy students from throwing trash.
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He will be good at dancing
She is not interested in watching football matches
Why don't we plant trees around our houses to get shade and fresh air?
We should put garbage bins around the schoolyard to prevent lazy students from throwing trash
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Cho ba vectơ , , đều khác vec tơ . Các khẳng định sau đây đúng hay sai?a) Nếu hai vectơ , cùng phương với thì , cùng phương.b) Nếu , cùng ngược hướng với thì và cùng hướng .
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Cho ba vectơ ,
,
đều khác vec tơ
. Các khẳng định sau đây đúng hay sai?
a) Nếu hai vectơ ,
cùng phương với
thì
,
cùng phương.
b) Nếu ,
cùng ngược hướng với
thì
và
cùng hướng .
a) Gọi theo thứ tự ∆1, ∆2, ∆3 là giá của các vectơ ,
,
cùng phương với
=> ∆1 //∆3 ( hoặc ∆1 = ∆3 ) (1)
cùng phương với
=> ∆2 // ∆3 ( hoặc ∆2 = ∆3 ) (2)
Từ (1), (2) suy ra ∆1 // ∆2 ( hoặc ∆1 = ∆2 ), theo định nghĩa hai vectơ ,
cùng phương.
Vậy
a) đúng.
b) Đúng.
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Trong mặt phẳng tọa độ các mệnh đề sau đúng hay sai?a) ( -3; 0) và (1; 0) là hai vectơ ngược hướng;b) ( 3; 4) và (-3; -4) là hai vectơ đối nhau;c) ( 5; 3) và (3; 5) là hai vectơ đối nhau;d) hai vec tơ bằng nhau khi và chỉ khi chúng có hoành độ bằng nhau và tung độ bằng nhau
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Trong mặt phẳng tọa độ các mệnh đề sau đúng hay sai?
a) = ( -3; 0) và
= (1; 0) là hai vectơ ngược hướng;
b) = ( 3; 4) và
= (-3; -4) là hai vectơ đối nhau;
c) = ( 5; 3) và
= (3; 5) là hai vectơ đối nhau;
d) hai vec tơ bằng nhau khi và chỉ khi chúng có hoành độ bằng nhau và tung độ bằng nhau
a) Đúng b) Đúng
c) Hai vectơ = ( 5; 3) và
= (3; 5) không cùng phương nên không thể đối nhau, do vậy câu c) sai
d) Đúng
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1. She is lazy, so she cant pass the exam.- If it ..................................................................................................................................................2. He smokes too much; thats why he cant get rid of his cough.-- If .......................................................................................................................................................3. Olga and Ivan werent paying attention, so they didnt see the sign marking their ex...
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1. She is lazy, so she can't pass the exam.
-> If it ..................................................................................................................................................
2. He smokes too much; that's why he can't get rid of his cough.
--> If .......................................................................................................................................................
3. Olga and Ivan weren't paying attention, so they didn't see the sign marking their exit from the highway.
--> If .......................................................................................................................................................
4. We put off our trip because the weather was terrible.
--> But for ..............................................................................................................................................
5. Sally doesn't know what she has to do for homework because she was absent from school on Friday.
-> If ......................................................................................................................................................
6. Martin failed his driving test last week because he was very nervous.
--> But for...................................................................................................................................
7. His father is sad now because he failed the examination again.
--> If he …………………………………………………………………..…………………………..
8. They had a terrible accident because they were too careless.
--> But for ……………….…………………………………………………………………………...
9. We could accuse him of having stolen our car because we had evidence.
--> Without …………………………………………………………………………….............….
10. I don’t know many people. I am lonely.
--> Were …………………………………………………………………………………………..
11. I hope it will rain soon. Otherwise, we will lack of water.
--> If it ……………………………………………………………………………………………...
12. She can't be employed because she doesn't have a college degree.
--> Were …………………………………………………..……………………………………….
13. Because of the attractive salary, I didn’t give up the job
--> Had it………………………………………………….………………………………………….
14. The heavy rain prevented us from getting there.
--> Without ……………………………………………..…………………………………………...
15. Fortunately, she arrived in time to save the boy.
--> If she ……………………………………….…………………………………………….......….
16. You had better have this car serviced .
--> If I …………………………………………………………………………………………….....
17. Give me the money or I will kill her.
--> Should …………………………………………………………………….………………………
Cho nửa đường tròn tâm O có đường kính AB 2R. Gọi M và N là hai điểm thuộc nửa đường tròn sao cho hai dây cung AM và BN cắt nhau tai I.a) Chứng minh . . và . .;B) Hãy dùng câu a) để tính . + . theo R
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Cho nửa đường tròn tâm O có đường kính AB = 2R. Gọi M và N là hai điểm thuộc nửa đường tròn sao cho hai dây cung AM và BN cắt nhau tai I.
a) Chứng minh .
=
.
và
.
=
.
;
B) Hãy dùng câu a) để tính .
+
.
theo R
a) Nối BM
Ta có AM= AB.cosMAB
=> || = |
|.cos(
,
)
Ta có: .
= |
|.|
| ( vì hai vectơ
,
cùng phương)
=> .
= |
|.|
|.cosAMB.
nhưng ||.|
|.cos(
,
) =
.
Vậy .
=
.
Với .
=
.
lý luận tương tự.
b) .
=
.
.
=
.
=> .
+
.
=
(
+
)
=> .
+
.
=
= 4R2
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