Light silk curtain can best keep out noise.
举一反三
- After noise is generated, what can be done to reduce human exposure to noise according to the second paragraph A: Replacing noisy products. B: Moving people out of the noisy place. C: Setting up laws to keep from getting worse. D: Using sources to reduce noise.
- Noise includes: ____________ noise, ____________ noise, ____________noise and ____________noise.
- She tried her best to () the trouble. A: keep on B: keep back C: keep out of D: keep down
- Which of the following sentences expresses "ability" A: He can’t have slept through all that noise. B: If you won’t keep quiet you can get out. C: You can’t take the book out of the room. D: The classroom can seat thirty students.
- They ______ because the light's on! A: must have gone out B: can't have gone out C: mustn't have gone out D: can't go out