A slogan to persuade others to eat quietly.

2. Office hours

16, this side is facing up.

17, introduction

18, one-way street

19, left/right, right/left

20. Buses only allow buses to pass.

2 1 wet paint

22, danger

23. Lost and Found Office

24. Make way for the express train to go first

Safety first, safety first

26. gas station

27. Smoking is prohibited.

28. Please don't take photos without them.

29. No tourists stopped.

30. No entry.

3 1, no admittance.

No honking. No honking.

33. Separate parking spaces

34. Free telephone calls are free.

35. fast forward

Rew。 rewind

37.EMS (Post) Express

38. Insert here Insert here.

39. Open here is open here.

40. Split here, tear here

4 1, machinery helps vehicle maintenance

42. "AA" movies prohibit people under the age of 14 from watching movies.

43. Overtaking is prohibited.

44. Do not turn around.

45. turn around. Ok, you can turn around

46. Cycling is forbidden in schools.

47.SOS emergency distress signal

48. Recruitment

49. Employee only is for the employees in this office.

50. Don't litter, don't litter.

5 1, put your hands away, please don't touch them.

52. Keep silent.

53. sale at a reduced price

54. Posting is not allowed.

55. Not for sale is not for sale.

Exactly 42