2. Height and weight: 5: 1.

3. The ratio of male to female employees in a certain unit is 2: 1.

4. National flag of China: 3: 2.

5. The girth ratio of neck and wrist is 2: 1.

6. The ratio of sand, cement and water in concrete is 2: 1.

7. The gold ratio is 1: 0.6 18.

8. The ratio of sand, cement and water in concrete is 2: 1: 1.

9. The volume ratio of hand and heart is 1: 1.

10. The aspect ratio of the rectangle;

1 1. The ratio of vegetables to salt when cooking;

12. the ratio of rice to water when cooking

13. the ratio of clothes to washing powder when washing

14. The ratio of sleep time to waking time is about 1:2.

15. When making mutton with eggs, the ratio of eggs to water should be 1: 1.

16. the ratio of medicine to water when spraying medicine to flowers

17. Ratio of hot water to cold water when washing feet

18. the ratio of tea to water when making tea

19. household income and expenditure ratio

20. The ratio of decoction to water

2 1. When grinding ink, the ratio of water to ink.

22. The proportion of people who love and are loved.

23. The ratio of winter electricity bill to summer electricity bill

24. This year's income is compared with last year's.

25. The speed is constant, and the distance is directly proportional to the time.

26. Time is fixed, and distance is directly proportional to speed.

27. The unit price is fixed, and the total price is directly proportional to the quantity.

28. The quantity is certain, and the total price is directly proportional to the unit price.

29. The individual output is fixed, and the total output is directly proportional to the quantity.

30. The quantity is certain, and the total output is directly proportional to the single output.

3 1. The number of pages read every day is certain, and the number of days is directly proportional to the total number of pages read.

32. The value of the score is certain, and the numerator of this score is directly proportional to the score.

The unit price is fixed, and the quantity is directly proportional to the total price.

34. The side length of a square is proportional to its area.

35. When the working hours are fixed, the working efficiency is directly proportional to the total amount of work.

36. When walking, the speed is constant. The more time you spend, the longer you walk.

37. When buying apples, the unit price must be fixed. The more money you pay, the more apples you buy.

38. Farmers grow crops with certain efficiency. The more land they plant, the more crops they harvest.

39. The perimeter and side length of a square.

40. The circumference and diameter of a circle.

4 1. Typing speed, typing time and total number of words remain unchanged.

42. Each copy has a certain quantity, and each copy is equal to the total number of vehicles.

43. Work efficiency is certain, including working hours and total workload.

44. Time is fixed, speed and distance.

45. When taking the bus, the unit price per hour remains unchanged, and the farther the distance, the more expensive it is.

46.。 When walking, the speed is constant. The more time you spend, the longer you walk.

47. When buying apples, the unit price must be fixed. The more money you pay, the more apples you buy.

48. Farmers grow crops with certain efficiency. The more land they plant, the more crops they harvest.

49. Speed is constant, and distance is proportional to time.

50. Time is fixed, and distance is directly proportional to speed.

The height of 5 1. is certain, and the bottom area is proportional to the area.

52. The area of the bottom is certain, and the area is directly proportional to the height.

53. The square brick area is certain, and the paving area is directly proportional to the number of blocks.

54. The number of blocks is certain, and the square brick area is directly proportional to the paving area.

55. The planting area is fixed, and the number of seeds is directly proportional to the total area.

56. When the number of seeds is fixed, the planting area is directly proportional to the total area.

57. When walking, the speed is constant. The more time you spend, the longer you walk.

58. When buying apples, the unit price must be fixed. The more money you pay, the more apples you buy.

59. Farmers grow crops with certain efficiency. The more land they plant, the more crops they harvest.

60. The perimeter and side length of a square.

6 1. The circumference and diameter of the circle.

62. The typing speed is fixed, the typing time and the total number of words.

63. The number of each share is fixed, and each share is equal to the total number of vehicles.

64. The total amount of coal is certain, the amount of coal burned every day and the number of days that can be burned.

65. The total amount of seeds is fixed, the amount of seeds sown per hectare and the number of hectares sown.

66. The speed and time required for Uncle Li to ride from home to the factory.

67. The unit price of a bag of fruit is in direct proportion to the quantity.

68. The daily consumption of a basket of coal is in direct proportion to the number of days used.

69. In a cuboid, the height is certain, and the bottom area is proportional to the volume.

70. The perimeter of the bottom of a cuboid is fixed, and the area of the side surface is directly proportional to the height.

7 1. In a circle, the circumference is proportional to the diameter, and the circumference is proportional to the radius.

72. Electricity is charged according to the degree. The more degrees you have, the more money you pay.

73. The longer the cold air is turned on, the lower the temperature.

74. A family with a good family style is harmonious, family members are healthy and easy to live long. Families with bad family style and quarreling and fighting all day are often prone to illness and shorten their life span.

75. attendance and attendance

76. In a cuboid, the height is certain, and the bottom area is proportional to the volume;

77. The circumference of the bottom of the cuboid is certain, and the side area is directly proportional to the height;

78. The number of bottles of the same size coke is directly proportional to its total weight.

79. Use cups to scoop water from the pool, and the number of scoops is directly proportional to the total volume of scooped water.

80. Running speed is constant, and running time is directly proportional to running distance.

8 1 .50 cents at a time, the degree of your household electricity is directly proportional to your household electricity bill.

82.