K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

3 tháng 4 2018

Đáp án C

câu b nha bạn 

k cho mình

1 tháng 4 2020

19. Hoa hate the…………………of the drill  

A. sound           

B. noise               

C. loud               

D. music

19 tháng 8 2017

1. The sound of the drill was so ........ that I felt scared.

A. loud B. loudly C. louder D. loudest

2. Farmer are always busy at ................. .

A. harvest's time B. harvesting time C. harvest time D. time harvesting

3. What should you do ........... yourself clean and tidy?

A. to take B. to do C. to make D. to give

4. I hate the .............. of the drill at the dentist's.

A. noise B. sound C. voice D. music

19 tháng 8 2017

Chọn đáp án đúng cho các câu sau:

1. The sound of the drill was so ........ that I felt scared.

A. loud B. loudly C. louder D. loudest

2. Farmer are always busy at ................. .

A. harvest's time B. harvesting time C. harvest time D. time harvesting

3. What should you do ........... yourself clean and tidy?

A. to take B. to do C. to make D. to give

4. I hate the .............. of the drill at the dentist's.

A. noise B. sound C. voice D. music

II/ Choose the word / phrase (A, B, C or D) that best fits the space in each sentence. (2pts ) 1. I hate the ________ of the drill at the dentist's.A. voice B. sound C. music D. symptom2. I'm scared__________ going to the hospital.A. about B. in C. on D. of3. Hoa learns how __________ a sewing machine.A. using B. used C.to use D. uses4. Yesterday, we had a __________ check-up.A. medicine B. medical C. medicines D. medically5. Liz bought a ___________ and hung it on the wall at homeA. magazine...
Đọc tiếp

II/ Choose the word / phrase (A, B, C or D) that best fits the space in each sentence. (2pts )

1. I hate the ________ of the drill at the dentist's.

A. voice B. sound C. music D. symptom

2. I'm scared__________ going to the hospital.

A. about B. in C. on D. of

3. Hoa learns how __________ a sewing machine.

A. using B. used C.to use D. uses

4. Yesterday, we had a __________ check-up.

A. medicine B. medical C. medicines D. medically

5. Liz bought a ___________ and hung it on the wall at home

A. magazine B. newspaper   C. aquarium D. poster

6. Her job is to cut, wash and shape people’s hair. She is a___________.

A. haircutter     B. hairdresser           C. hair maker         D. hair shape  

7. After their visit to the aquarium , they went to a food stall ___________ lunch .

A. at B. to C.in D. for

8. Hoa’s ___________ is sewing.

A. like B. enjoyment C. hobby D. free time                      Help!!!!!

 

0
5 tháng 3 2020

1. The dentist told her not___worried___. (worry – to worry – worried – worrying)

2. I hate the___noise___of the drill. (music – sound – noise)

3. Children are___scared___of seeing the dentist. (enjoyable – scared – favorite)

4. The dentist___fill___a cavity in his tooth. (did – filled – made)

Perfect Answer

~ ✰ Study well ✰ ~

5 tháng 3 2020

1. The dentist told her not______. (worry – to worry – worried – worrying)

2. I hate the______of the drill. (music – sound – noise)

3. Children are______of seeing the dentist. (enjoyable – scared – favorite)

4. The dentist______a cavity in his tooth. (did – filled – made)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

The passage discusses a way to deal with an offensive noise by_________.

A. diverting people's attention from it

B. masking it with a louder noise 

C. canceling it out electronically 

D. removing its source

1
23 tháng 3 2019

Đáp án C

Thông tin ở câu thứ 2 và 3 của đoạn đầu tiên: One way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. (Một cách để cách âm là sử dụng nút tai. Một cách nữa là triệt tiêu âm thanh với dụng cụ chống âm)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

The researcher mentioned in the passage are concerned about unwanted noise because it can_________.

A. cause deafness 

B. create hazardous working conditions 

C. influence ocean waves 

D. damage loudspeakers and sound equipment

1
10 tháng 9 2019

Đáp án B

Thông tin ở câu cuối: … which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

(những âm thanh không mong muốn có thể gây mệt mỏi, ảnh hưởng đến năng suất và sự tỉnh táo của phi hành đoàn, và có thể che mất âm thanh cảnh báo và tín hiệu bão => tạo ra tình trạng làm việc nguy hiểm)

6 tháng 4 2020

Minh looks.....worried......again. What's the matter with him? (worry)

I am......scared....of the sound of drill when I go to the dentist.(scare)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

The passage compares sound to_________.

A. the rising and falling of water in the ocean 

B. the crests and valleys of mountain ranges 

C. a flag waving in the air 

D. a machine for gauging air pressure 

1
30 tháng 3 2017

Đáp án A

Thông tin ở câu đầu tiên của bài đọc: Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. (Âm thanh di chuyển hình thành nguồn gốc của nó trong tai bởi biến động trong áp suất không khí, một cái gì đó giống như các đỉnh và đáy của sóng biển.)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions. Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following questions.

Sound moves form its source to the ear by wavelike fluctuations in air pressure, something like the crests and troughs of ocean waves. Once way to keep from hearing sound is to use ear plugs. Another way is to cancel out the sound with anti-sound. Using a noisemarker controlled by a microprocessor, engineers have produced sound waves that are half a wavelength out of phase with those of the noise to be quieted-each crest is matched to a trough, and vice versa. Once the researchers have recorded the offending sound, a microprocessor calculates the amplitude and wavelength of sound that will cancel out the crests and troughs of noise. It then produces an electric current that is amplified and fed to a loudspeaker, which produces anti-sound and wipes out the noise. If the anti-sound goes out of synchronization, a microphone picks up the leftover sound and sends it back to the microprocessor, which changes the phase of the anti- sound just enough to cause complete silence.

The research team has concentrated on eliminating low-frequency noise from ship engines, which causes fatigue that can impair the efficiency and alertness of the crew, and may mask the warning sounds of alarm and fog signals.

What is the main purpose of the passage?

A. To discuss a physical handicap

B. To warn about a growing danger 

C. To describe the structure of the ear 

D. To report on a new invention 

1
31 tháng 1 2017

Đáp án D

Mục đích của bài này là To report on a new invention (Giới thiệu một phát minh mới). Phát minh đó là sử dụng bộ vi xử lý (a microprocessor) để loại bỏ các âm thanh không mong muốn