hình 84 không có tam giác bằng nhau vi :

khi xét tam giác MNP và tam gaic MPQ co 

NP=PQ (giả thiết)

MP là cạnh chung

góc M1=góc M2 (gia thiet)

Nhưng góc M1 và M2 không phải là góc xen giữa cua cac canh MN,NP va PQ,MQ

suy ra hình 84 không có tam giác nào bằng nhau

hình 84 không có tam giác bằng nhau vi :

khi xét tam giác MNP và tam gaic MPQ co 

NP=PQ (giả thiết)

MP là cạnh chung

góc M1=góc M2 (gia thiet)

Nhưng góc M1 và M2 không phải là góc xen giữa cua cac canh MN,NP va PQ,MQ

suy ra hình 84 không có tam giác nào bằng nhau

Đề là : Cho biết có thể vẽ được bao nhiêu đoạn thẳng trong mỗi trường hợp sau :

a) Với hai điểm phân biệt cho trước

b) Với ba điểm phân biệt cho trước

c) Với bốn điểm phân biệt cho trước

Đề: |x-1|+|x-4|=3x

Xét x > 4 , ta có:

x - 1 + x - 4 = 3x

=> 2x - 5 = 3x

=> x = - 5 (không thỏa mãn)

Xét \(1\le x\le4\), ta có:

x - 1 + 4 - x = 3x

=> 3x = 3

=> x = 1 (thỏa mãn)

Xét x < 1 , ta có:

1 - x + x - 4 = 3x

=> 3x = 3

=> x = 1 (không thỏa mãn)

Vậy x = 1

Ơ anh cho này cu.

000

miuk mới hok lp 6

cấp trường hay là j

PART A: PHONETICS (2pts)

Section I: Choose the word which has the underlined part pronounced differently from the others.(1pt)

1. A. school                 B. chair                  C. chemistry              D. character

2. A. serious                B. symptom           C. sugar                     D. sauce

3. A. order                   B. novel                 C. portable                 D. score

4. A. coop                   B. cartoon              C. stool                      D. indoors

Section II. Choose the word that has different stress from others.(1pt)

1. A. complete             B. detective            C. gather                    D. event

2. A. mixture                B. allow                  C. affect                    D. disease

3. A. exit                     B. cushion              C. turtle                      D. improve

4. A. museum              B. useful                C. cavity                     D. wedding

PART B: VOCABULARY AND GRAMMAR.(10pts)

Section I: Choose the best answer from A,B,C or D to fill in the gaps.(2pts)

1. She is staying................................her uncle and aunt's house.

A. at                           B. in                       C. with                        D. on

2. Their trip to Da Lat ....................wonderful.

A. was                        B. were                   C. are                          D. is

3. There is............................meat in the box.

A. any                        B. a few                  C. a little                       D. many

4. Don't forget .....................your teeth before going to bed.

A. brush                     B. to brush              C. brushing                    D. not to brush

5 You ............................stay at home when you are sick.

A. had better               B. should                C. mustn't                      D. A and B

6. He doesn't like candy. I.................

A. don't too                 B. don't, either         C. don't neither               D. do so

7. I divided the sweets.....................several boys.

A. during                    B. between              C. into                            D. among

8. He was only ten, but he ate........................his father did.

A. as much as            B. more that            C. much than                  D. as much than

Section II: Supply the correct tense for the verbs in brackets.(2pts)

1. My mother often (go)..............to the market every morning but she ( not go)....................there this morning.

=> .........................................................................................................

2. When (you/ have).........................the last medical check-up?

=> .........................................................................................................

3. Why ( you/ not take) ..................part in the picnic last Sunday?

=> .........................................................................................................

4. Where ( your teacher/ be)....................?

- He (explain)......................a new lesson in that class.

=> .........................................................................................................

=> .........................................................................................................

5. I (pick)...............you up at your hotel in half an hour.

=> .........................................................................................................

6. We can't go out now because it (rain) .

=> ................................................................................................

Section III: Give the correct form of the words in brackets.(2pts)

1. The noise in the city kept Hoa...................at night. (Wake)

2. In................to that, my bike tires was flat. (Add)

3. Mr. Tan has a very...............................tooth. (Pain)

4. Then, Thanh.................a pan and stir-fried the beef. (Hot)

5. Sugar is not an......................food because we need it to live. (Health)

6. Catching the common cold is..................for every body. (Please)

7. Don't worry! Your cold will last for a few days and then................ (Appear)

8. I have.................time to play than my friend. (Little)

Section IV: Finish each of the following sentences in such a way that it is as similar as possible in meaning to the sentence printed before it.(2pts)

1 Listening to music is more interesting than watching TV.

=> I prefer........................................................................................................

2. It isn't important for you to finish the work today.

=> You don't......................................................................................................

3. How much is this dictionary?

=> What ........................................................................................................?

4. How heavy is the chicken?

=> What...........................................................................................................?

5. Mr. Trung and Mrs. Trung type quickly .

=> Mr. Trung and Mrs. Trung..................................................................................

6. I got to work in half an hour yesterday.

=> It took ..........................................................................................................

7. My mother doesn't like coffee and tea.

=> My mother likes neither....................................................................................

8. You shouldn't eat too much candy.

=> You'd...........................................................................................................

Section V: There is a mistake in each of these sentences. Underline the mistake and then correct it. (2pts)

1. The dirt on vegetables can cause you sick .

=> ..................................................................................................................

2. Scientists say that the life started in the ocean .

=> .................................................................................................................

3. He gave up to smoke 2 years ago.

=> ...................................................................................................................

4. He is a fast runner. He runs fastly.

=> ...................................................................................................................

5. Can I lend your pencil? I'm sorry. I'm using it.

=> ...................................................................................................................

6. You should keep silently when they are working.

=> ..................................................................................................................

7. How many times in a day do you brush your teeth ?

=> ...................................................................................................................

8. Long is worried because he has see the dentist.

=> ...................................................................................................................

PART C: READING.( 4pts)

Section I: Read the following story and write true (T) or false (F). (1.5pts)

When Dave was young, he played a lot of games, and he was thin and strong, but when he was forty-five, he began to get fat and slow. He was not able to breathe as well as before, and when he walked rather fast, his heart beat painfully.

He did not do anything about this for a long time, but finally he became anxious and went to see a doctor, and the doctor sent him to a hospital. Another young doctor examined him there and said, " I don't want to mislead you, Mr. Dave. You are very ill, and I believe that you are unlikely to live much longer. Would you like me to arrange for anybody to come and see you before you die?

Dave thought for a few seconds and then he answered, "I'd like another doctor to come and see me".

Your answers:

1. Dave was fat and slow until he was forty five.

2. As soon as Dave had trouble in breathing and walking, he went to see a doctor.

3. Dave was afraid he was ill.

4. The young doctor thought Dave was going to die soon.

5. He wanted to see another doctor, first.

6. Dave did not trust the young doctor.

Section II: Read the passage and write ONE suitable word for each space. (2.5pts)

Many people nowadays have to wear false teeth when they was middle-aged.

Since the beginning of this century,(1)..................decay has greatly increased. The amount(2) ..................sugar in our food has also increased Doctors and dentists now know that(3)..........................is the chief cause of tooth(4) ................ Eskimos' teeth, for example, started to(5)..........when they began to eat sweet(6)..................

Long ago doctors did not like(7).........treat people's teeth. Barbers and blacksmiths(8)................after people's teeth and pulled them(9)............ when they decayed. Some people thought(10)..................................was a punishment from the gods.

PART D: READING.( 4pts)

Section I: Using the givens words to write a passage. (2pts)

Dung/ go/ Nha Trang/ family/ vacation/ last month//. She/ stay/ hotel/ side/ beach//. In the early morning/ she/ go/ sea/ swim/an hour//. Then/ she/ breakfast/ food stall/ beach/ enjoy/ fresh air/ morning//. Afternoon/ she/ take/ photos/ sights//. She/ stay/ Nha Trang/ four days/ took/ nice photos//. She/ also/ buy/ postcards/ souvenirs/ friends//. It/ be/ great vacation/ because/ she/ have/fun.

..........................................................................................................................................................................................

..........................................................................................................................................................................................

..........................................................................................................................................................................................

Section II: Write a passage about 150 words to describe the activities at recess (2pts)

..........................................................................................................................................................................................

..........................................................................................................................................................................................

..........................................................................................................................................................................................

ĐÁP ÁN VÀ BIỂU ĐIỂM ANH 7

PART A: PHONETICS (2pts)

Section I: Choose the word which has the underlined part pronounced differently from the others. (1pt) (0.25x4=1pt)

1. B    2. C     3. B      4. D

Section II. Choose the word that has different stress from others. (1pt) (0.25x4=1pt)

1. C    2. A     3. D      4. A

PART B: VOCABULARY AND GRAMMAR.(10pts)

Section I: Choose the best answer from A,B,C or D to fill in the gaps.(2pts) (0.25x8=2pts)

1. A    2. D    3. C      4. B

5. D    6. B    7. D      8. A

Section II: Supply the correct tense for the verbs in brackets. (2pts) (0.25x8=2pts)

1. My mother often goes to the market every morning but she doesn't go there this morning.

2. When did you have the last medical check-up?

3. Why didn't you take part in the picnic last Sunday?

4. Where is your teacher?

- He is explaining a new lesson in that class.

5. I will pick you up at your hotel in half an hour.

6 We can't go out now because it is raining

Section III: Give the correct form of the words in brackets.(2pts) (0.25x8=2pts)

1. awake          2. addition        3. painful         4. heated

5. unhealthy     6. unpleasant    7. disappear    8. less

Section IV: Finish each of the following sentences in such a way that it is as similar as possible in meaning to the sentence printed before it.(2pts) (0.25x8=2pts)

1. I prefer listening to music to watching TV.

2. You don't have/need to finish the work today.

3. What is the price of this dictionary?

4. What is the weight of chicken?/ What is the chicken's weight?

5. Mr. Trung and Mrs are quick typists .

6. It took me half an hour to get to work yesterday .

7. My mother likes neither coffee nor tea .

8. You'd better not eat too much candy.

Section V: There is a mistake in each of these sentences. Underline the mistake and then correct it.(2pts) (0.25x8=2pts)

1. The dirt on vegetables can make you sick.

2. Scientists say that life started in the ocean.

3. He gave up smoking 2 years ago.

4. He is a fast runner. He runs fast.

5. Can I borrow your pencil? I'm sorry. I'm using it.

6. You should keep silent when they are working.

7. How many times a day do you brush your teeth?

8. Long is worried because he has to see the dentist.

PART C: READING.( 4pts)

Section I: Read the following story and write true(T) or false(F). (1.5pts) (0.25x6=1.5pts)

1. F     2. F     3. T    4. T      5. F     6. T

Section II: Read the passage and write ONE suitable word for each space.(2.5pts)

Your answers: (0,25x10=2.5pts)

1. tooth     2.of      3. sugar      4. decay      5. decay

6. food      7. to     8. looked     9. out         10. toothache

PART D: READING.( 4pts)

Section I: Using the givens words to write a passage. (0,25x8=2pts)

Dung went to Nha Trang with her family on vacation last week. She stayed at a hotel on the side of the beach. In the early morning, she went to the sea and swam for an hour. Then she had breakfast in the food stall on the beach to enjoy fresh air in the morning. In the afternoon, she took some photos of the sights. She stayed in Nha Trang for four days and took of a lot of nice photos. She also bought some postcards and souvenirs for her friends. It was a great vacation because she had a lot of fun.

Section II: Write a passage about 150 words to describe the activities at recess. (2pts)

- Vocabulary: 0,5 - meaning: 0,5

- Grammar: 0,5 - logical: 0,5