The reason of enjoying cool under big trees is explained by transpiration

The reason of enjoying cool under big trees is explained by transpiration

This is because the transpiration of big trees is more obvious. The so-called transpiration refers to the process in which water in plants is lost to the atmosphere in a gaseous state. Different from general evaporation, transpiration is a physiological process regulated by plant structure and stomatal behavior

The age ratio of father, mother and Xiao Li is 19:18:6. Two years later, the age ratio of the three is 92. How old is Xiao Li this year?

92-3 × 2 = 86 (years old) 86 × 619 + 18 + 6 = 86 × 643 = 12 (years old) a: Xiao Li is 12 years old

Dad, mom and Xiao Li are 72 years old. Five years ago, they were 58 years old

72-58=14
5*3=15
15-14=1
5-1=4
So Xiao Li is 4 years old
Xiao Li was not born five years ago

My brother is 12 years older than Xiaoli this year. Eight years ago, my brother was four times as old as Xiaoli______ Year old, Xiao Li______ I'm 40 years old

The age difference between the two is 12 years old; from the difference multiple formula, we can get: eight years ago, Xiaoli's age was 12 ÷ (4-1) = 4 years old; eight years ago, her elder brother's age was 4 × 4 = 16 years old; this year, her elder brother's age is 16 + 8 = 24 years old; this year, Xiaoli's age is 4 + 8 = 12 years old. A: her elder brother is 24 years old and Xiaoli is 12 years old