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PHÒNG GIÁO DỤC VÀ ĐÀO TẠO THÀNH PHỐ TÂY NINH KỲ KIỂM TRA HỌC KÌ I - NĂM HỌC 2020 – 2021 MÔN: TOÁN – LỚP 9 Ngày kiểm tra: 16 tháng 12 năm 2020 Thời gian: 90 phút (không kể thời gian giao đề) (Học sinh không phải chép đề vào giấy thi) Câu 1: (2,0 điểm) a) Tìm điều kiện của x để /2x +5 có nghĩa. b) Thực hiện phép tính: 4 + V9- /25 Câu 2: (1,0 điểm) So sánh 4/7 và 105 Câu 3: (1,0 điểm) Một con thuyền vượt qua một khúc sông nước chảy mạnh với với vận tốc 3,5km/h trong thời gian là 6 phút (x...
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N.N.K.H | Nguyễn Ngọc Kh...
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Niki Channel
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Niki Channel
20 tháng 10 2021 lúc 15:22

giúp mình với

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nopro
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Đỗ Thanh Hải
23 tháng 5 2021 lúc 10:55

Choose best answer A, B, C or D to complete the following sentences. Mark your answer on your answer sheet

Câu 1. Air________ is one of the main problems we all have to solve.

A. polluting B. polluted C. pollute D. pollution

Câu 2. He ran so ________ that no one could catch up with him.

A. quick B. quickly C. quicklier D. quickness

Câu 3. Try again! Don’t give _____ hope.

A. away B. of C. up D. off

Câu 4. He __________ the phone when we arrived.

A. was answering B. is answering C. has answered D. answered

Câu 5. This is the __________ book that I’ve ever read..

A. interesting B. more interesting C. most interesting D. less interesting

Câu 6. Would you mind ___________ this letter for me?

A. post B. to post C. posted D. posting

Câu 7. “He had to work 12 hours everyday.” - “____________”

A. Sure. B. I can’t imagine that.

C. How cool! D. I wish I could go back to that time.

Câu 8. Everything is OK, ___________?

A. is it B. isn’t it C. are they D. doesn’t it

Write the letter A, B, C, or D to indicate the word whose underlined part is pronounced differently front that of the rest in each of the following questions.

Câu 9. A. days B. says C. stays D. ways

Câu 10. A. laughed B. hoped C. mixed D. decided

Write the letter A, B, C or D on your answer sheet to indicate the option that needs correcting

Câu 11. The man and his dog which are our next-door neighbors are very friendly

A. his B. which C. neighbors D. friendly

Câu 12. If the lady is not too old, she would get a better job in this city.

A. is B. get C. better D. in

Write the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the given ones

Câu 13. No one can help him with the housework today.

A. He can be helped with the housework today. B. He can’t help with the housework today.

C. He can’t be helped with the housework today. D. He can’t be help with the housework today.

Câu 14. My mother is so old that she can’t work hard.

A. My mother is not old enough to work hard. B. My mother is too old to work hard.

C. My mother is such old to work hard. D. My mother is not old to work hard.

Câu 15. “How long have you learnt English, Nam?” Nga asked.

A. Nga asked me how long Nam has learnt English. B. Nga asked Nam how long he has learnt English.

C. Nga asked Nam how long he had learnt English. D. Nga asked me how long Nam had learnt English.

Read the following passage and choose the correct answer (A, B, C or D) to fill in each of the blank spaces below

Nowadays people are more aware that wildlife all over the world is in (16) ________. Many species of animals are threatened, and could easily become (17) ________ if we do not make an effort to protect them. There are many reasons for this. In some cases animals are hunted for their fur or for other valuable parts of their bodies. Some birds, such as parrots, are (18) _______ alive and sold as pets. For many animals and birds, the problem is that their habitatsthe place where they live-is disappearing. More land is used for farm, for houses and industry, and there are fewer open spaces than there once were. Farmers use powerful chemicals to help them grow better crops, but these chemicals pollute the environment and (19) ________ wildlife. The most successful animals on Earth, human beings, will soon be the only ones (20) ________ unless we can solve this problem.

Câu 16. A. threat B. problem C. danger D. vanishing

Câu 17. A. disappeared B. vanished C. extinct D.empty

Câu 18. A. catched B. caught C. catching D. catch

Câu 19. A. spoil B. wound C. wrong D.harm

Câu 20. A. left B. over C. staying D. survived

Read the passage and choose the correct answer (A, B, C, or D) for questions 21-25.

Almost a hundred thousand people were killed and half a million homes destroyed as a result of an earthquake in Tokyo in 1923. The earthquake began a minute before the noon when the inhabitants of Tokyo were cooking their midday meals. Thousands of stoves were overturned as soon as the earth began to shake. As a result, small fires broke out everywhere and quickly spread. The fire engines were prevented from going to help because many of the roads had cracked open. It was impossible to use fire fighting equipment as most of the water pipes had burst. Consequently, over ninety percent of the damage caused by fire rather than by the collapse of the buildings.

Câu 21. How many people were killed in the earthquake in Tokyo in 1923?

A. Ten thousand people B. Almost a hundred thousand people

C. Thousands of people D. Many people

Câu 22. When did the earthquake begin?

A. began a minute before the noon in 1923 B. began a minute before the noon in 1924

C. began a minute before the noon in 1925 D. began a minute before the noon in 1922

Câu 23. What happened as soon as the earth began to shake?

A. people died B. the water pipes had burst

C. Thousands of stoves were overturned D. the roads had cracked open

Câu 24. Why was the fire engines prevented from going to help?

A. because the water pipes had burst B. because no one helped

C. because small fires broke out everywhere D. because many of the roads had cracked open

Câu 25. What was most of the damage caused by?

A. fire B. the roads C. water pipes D. the collapse of the buildings

Read the following passage and choose the correct answer (A, B, C or D) to fill in each of the blank spaces below

Today, supermarkets are found in almost every large city in the world. But the first supermarket (26)_________opened only fifty years ago. It was opened in New York by a man named Michael Cullen. A supermarket is different (27)___________other types of stores in several ways. In supermarkets, goods are placed on open shelves. The (28)__________ choose what they want and take them to the checkout counter. This means that fewer shop assistants are needed than in other stores. The way products are displayed is another difference between supermarkets and many other types of stores; (29)__________ example, in supermarkets, there is usually a display of small inexpensive items just in front of the checkout counter: candies, chocolates, magazines, cheap foods and so on. Most customers (30)__________go to a supermarket buy goods from a shopping list. They know exactly what they need to buy. They do the shopping according to a plan.

Câu 26. A. is B. has been C. was D. were

Câu 27. A.in B. from C. of D. with

Câu 28. A. customers B. managers C. assistants D. sellers

Câu 29. A.in B. of C. for D. about

Câu 30. A. who B. what C.which D.whom

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Đỗ Tú Anh
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Kudo Shinichi
24 tháng 12 2021 lúc 22:36

Gọi số gv Văn, Toán, Anh lần lượt là: \(a,b,c\left(a,b,c\ne0\right)\)

Áp dụng t/c của dãy tỉ số bằng nhau, ta có:

\(\dfrac{a}{2}=\dfrac{b}{4}=\dfrac{c}{3}=\dfrac{b-c}{4-3}=16\left(gv\right)\)

Khi đó:

\(\dfrac{a}{2}=16\Rightarrow a=16.2=32\left(gv\right)\)

\(\dfrac{b}{4}=16\Rightarrow b=16.4=64\left(gv\right)\)

\(\dfrac{c}{3}=16\Rightarrow c=16.3=48\left(gv\right)\)

 

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Vũ Nhật Minh
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Câu 2 TL:

Nửa chu vi thửa ruộng:

240:2=120(m)

Chiều dài thửa ruộng:

(120+20):2=70(m)

Chiều rộng thửa ruộng:

70-20=50(m)

Diện tích thửa ruộng:

70 x 50 = 3500(m2)

Đ.số: 3500m2

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Câu 3 TL:

Hiệu số phần bằng nhau:

5-2=3(phần)

Tuổi mẹ là:

24:3 x 5=40(tuổi)

Tuổi con là:

40-24=16(tuổi)

Đ.số: mẹ 40 tuổi ,con 16 tuổi

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Câu 1TL:

\(a,\dfrac{2}{3}+\dfrac{4}{5}=\dfrac{2\times5+4\times3}{3\times5}=\dfrac{10+12}{15}=\dfrac{22}{15}\\ b,\dfrac{5}{2}-\dfrac{1}{3}:\dfrac{1}{6}=\dfrac{5}{2}-\dfrac{1}{3}\times6=\dfrac{5}{2}-\dfrac{6}{3}=\dfrac{5}{2}-2=\dfrac{5}{2}-\dfrac{4}{2}=\dfrac{1}{2}\)

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Ngọc Hạ Khánh
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Mỹ Duyên Nguyễn
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Nguyễn Bảo Nguyên
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Nguyễn Lê Phước Thịnh
26 tháng 8 2023 lúc 10:05

3:

Thời gian đi là:

8h42'-7h30'=1h12'=1,2h

Vận tốc trung bình của ô tô là:

60:1,2=50km/h

2:

a: 72 giờ=3  ngày

3h15p=195p

b: 2,5h=150p

153p=2h33p

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