Một vật được ném thẳng đứng lên cao với tốc độc 15m/s từ độ cao 5m so với mặt đất. Bỏ qua sức cản của không khí, tính vận tốc lớn nhất của vật khi gần chạm đất

Cho 5,6 g Fe phản ứng hết với m (g) dung dịch HCI 14,6% thu được dung dịch muối có nồng độ n% và Q lít khí Hydrogen ở điều kiện chuẩn.
a. Viết PTHH xảy ra.
b. Xác định giá trị của Q.
C. Xác định giá trị của m.
Xác định giá trị của n.

Cho 13 g Zn phản ứng hết với m (g) dung dịch H2SO4 9,8% thu được dung dịch muối có nồng độ n% và Q lít khí Hydrogen ở điều kiện chuẩn.
a. Viết PTHH xảy ra.
b. Xác định giá trị của Q.
c. Xác định giá trị của m.
d. Xác định giá trị của n.

Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Question 27:

A many                      B. chat                       C. relax                     D. pack

Question 28:

A. pleased                 B. liked                      C. washed                 D. laughed

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Question 29:

A. intermediate       B. deforestation      C. documentary      D. economical

Question 30:

A. Easter                   B. chopsticks            C. nuclear                 D. account

Four phrases/sentences have been removed from the text below. For each question, mark the letter A, B, C or D on your answer sheet to indicate the correct option that fits each of the numbered blanks from 31 to 34 the most

A. They hop and run fast to escape from danger

B. They swim in the water and breathe with gills

C. can fly to find food and travel

D. They are slow but have strong protection

Animals are amazing creatures because they can do many things that help them survive. Birds, for example, (31) ... They have wings that allow them to fly high in the sky, and they can travel long distances when they migrate. Some animals, like rabbits and kangaroos, are very fast and cam jump high. (32) … They use their strong legs to hop quickly away from danger, such as predators. Fish are different because they live in water, like oceans, rivers, and lakes. (33) … They have scales to protect their bodies and fins that help them swim smoothly. Finally, some animals, like turtles and snails, move very slowly. (34) ..... They have shells on their backs, which act as a strong shield to keep them safe from harm.

Question 31…..      Question 32…..      Question 33…..      Question 34.....

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other aree in the position of primary stress in each of the following questions

Question 17: The…………. side to be safe. says that there is a chance of snow later this weekend. We should stay inside to be safe

A. weather forecast

B. weather board

C. weather feature

D. weather condition

Question 18: Children with receive chocolate eggs on Easter Day ………… they have been good.

A. as long as

B. as well as

C. as soon as

D. as much a

Question 19: On average, refrigerators for 18 to 20 percent of your electricity use.

A. account

B. look

C. take

D. get

Question 20: The light in the living room is not working. Why don't you call ……… to check?

A. a plumber

B. a butcher

C. an electrician

D. a mechanic

Question 21: The engaging lessons made all of the students ……… interested in learning history.

A. feel

B. feeling

C. to feel

D. felt

Question 22: What …………. to salt if we put it on ice?

A. had happened

B. would happen

C. will happen

D. happen

Question 23: He ………. very fast when he an accident.

A. drived/had

B. was driving/was having

C. was driving/had

D. drove/was having

Question 24: Lucas: "Why don't we collect old batteries and recycle them properly?"

Amelia: “………..”

A. I couldn't agree.

B. I think we should recycle.

C. I like batteries.

D. Great Let's do that.

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is made from the given cues in each of the following questions

Question 13: The doctor/usk/him/cut/down/sweet food/drinks

A. The doctor asked him to cut down sweet food and drinks.

B. The doctor asked him cut down on sweet food and drinks.

C. The doctor asked him to cut down on sweet food and drinks.

D. The doctor asked him cut down sweet food and drinks.

Question 14: She suggest/take/plane/today/or/go/train tomorrow.

A. She suggested taking the plane today or we should go by train tomorrow.

B. She suggested taking the plane today or going by train tomorrow.

C. She suggested to take the plane today or to go by train tomorrow.

D. She suggested that we should take the plane today or going by train tomorrow.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 15 to 16

Question 15. Put the sentences (a-c) in the correct order, then fill in the blank to make a logical text

We were excited about our annual school sports day. The events were well-organized, and everyone vas ready to compete. …………

a.During the relay race, one of the runners tripped and fell, which caused a delay. b. However, things didn't go exactly as planned.

c. Despite the mishap, we managed to finish the races, and the day ended on a positive note.

A. b-a-c                     B. b-c-a                      C. a-b-c                      D. c-b-a

Question 16. Choose the sentence that most appropriately ends the text (In Question 15).

A. The sports day was successful, and everyone had a lot of fun.

B. We were disappointed, but we learned how to handle unexpected situations.

C. The relay race was canceled due to the accident.

D. We had to postpone the sports day until the following week.

Read the following announcement and mark the letter A, B, C or D on your answer sheet to indicate the correct option that best fits each numbered blank from 7 to 10

PUBLIC TRANSPORT ANNOUNCEMENT

Welcome to City Bus Service! To have a safe trip, please (7)____ these rules:

Always have your (8)____ ready for checking.

Listen to (9)_____ announcements for important news.

If you (10)_______ any bags left alone, tell the staff right away

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closet in meaning to the original sentence in each of the following questions

Question 11: I wanted to go to the party, but I had to stay at home and finish my assignment.

A. Though I wanted to go to the party. I had to stay at home and finish my assignment.

B. Though I wanted to go to the party, but I had to stay at horne and finish my assignment

C. When I wanted to go to the party, I had to stay at home and finish my assignment

D. Because I wanted to go to the party, I had to stay at home and finish my assignment.

Question 12: He is very young, he can't play that computer game

A. He is so young that he can play that computer game.

B. He's such a young that he can't play that computer game.

C. He is so young that he can't play that computer game.

D. He is so a young that he can play that computer game.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 1 to 6

Water pollution can be caused by a variety of things. Firstly, sewage is dumped directly into the seas without being treated properly. This is a global problem, with equally significant challenges in high-, middle, and low-income countries. Sewage pollution has reduced the water quality and posed several threats to human health. Secondly, cruise ships release a large amount of garbage into the ocean every year. 40 percent of cruise ships depend on 30-year-old waste treatment technology, leaving sewage with high levels of bacteria, heavy metals and other pollutants that are harmful to aquatic life and people. The third reason is oil spills. Oil spills happen in many different ways. Most of these spills are small and happen accidentally, for example oil spills while refueling a ship. But these spills can still cause damage, especially if they happen in sensitive environments. Large oil spills are disasters. These tend to happen when pipelines break, or big oil tankers sink. The negative effects of oil spills on the ecosystems and economies can be seen for decades following a large oil spill.

Question 1: According to the passage, oil spills.

A. can be used in refueling activities.

B. are caused by oil tanker accidents.

C. affect the environment in a short period of time.

D. only happens in sensitive environments.

Question 2: What is the OPPOSITE meaning of "significant" in the context?

A. noticeable

B. important

C. major

D. minor

Question 3: What is the CLOSEST meaning of "pollutants" as used in the text?

A. products.

B. resources

C. contaminants.

D. cleaners.

Question 4: According to the passage, sewage pollution can____

A. reduce the amount of water

B. be harmful to the quality of ships

C. be a danger to human health

D. produce heavy metals

Question 5: What do many cruise ships rely on for waste treatment?

A. New technology.

B Manual waste disposal.

C. No technology at all.

D.30-year-old technology.

Question 6: Why is sewage pollution a global problem?

A. It reduces water quality everywhere.

B. It only affects low-income countries.

C. It is not a serious issue.

D. It is only a problem in high-income countries.

Giải hộ em ý 3 ạ

Cho hai biểu thức A = \(\dfrac{x+5}{x^2}\) B = \(\dfrac{4}{x-5}+\dfrac{x^2-6x+45}{25-x^2}\) với \(x\ne0;x\ne\pm5\)
1) Tính giá trị của biểu thức A khi \(x=-3\)
2) Chứng minh B = \(\dfrac{5-x}{x+5}\)
3) Xét biểu thức P =A.B Tìm tất cả các giá trị nguyên của x để biểu thức P có giá trị nguyên.