The relationship between evaporation rate of water and temperature? Such as the title Eliminate air flow

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• 1. What's the meaning of SGN
• 2. Xiao Ming is 6 years old and his grandfather is 62 years old. A few years later, Xiao Ming's age is 13 times his grandfather's?
• 3. This year, my grandfather's age is six times that of Xiao Ming. In a few years, my grandfather's age will be five times that of Xiao Ming. In a few years, my grandfather's age will be four times that of Xiao Ming
• 4. My father said, "this year, the age ratio between my grandfather and Xiao Ming is 7:1. My grandfather is 60 years older than Xiao Ming. How old is my grandfather this year“
• 5. Dad said, "the age ratio of grandfather and Xiao Ming is 7:1. Grandfather is 60 years older than Xiao Ming. How old is grandfather this year?" please help Xiao Ming figure out how old is grandfather this year
• 6. I heard that you are good at math, so I want to ask you a question. Dad said, "this year, the age ratio of grandfather and Xiao Ming is 7:1, and grandfather is 60 years older than Xiao Ming, How old is grandfather this year? "
• 7. This year, Xiaoming's father's age is four times that of Xiaoming, and the sum of Xiaoming's age and his father's age is just the age of his grandfather, who is 63 years old How old is Xiao Ming this year?
• 8. Xiao Ming's grandfather is 60 years old. His father's age is 7 / 12 of his grandfather's. Xiao Ming's age this year is 2 / 7 of his father's. how old is Xiao Ming this year? Determinant
• 9. My grandfather said to Xiao Ming, "I'm seven times your age now, six times your age in a few years, five times, four times, three times and two times your age in a few years."______ Xiao Ming is now______ ．
• 10. My grandfather said to Xiao Ming, "I'm seven times your age now, six times your age in a few years, five times, four times, three times and two times your age in a few years."______ Xiao Ming is now______ ．
• 11. On monotone boundedness of sequence function Let f (x) be monotonically bounded in (- ∞, + ∞) and {xn} be a sequence. The following proposition is correct () If a {xn} converges, then {f (xn)} converges B if {xn} is monotone, then {f (xn)} converges How to judge these two options?
• 12. Find a few English words to describe the character Hand it in tomorrow
• 13. Total differential z = (x ^ 2 + y ^ 2) / (x ^ 2-y ^ 2)
• 14. Let X and y be real numbers, and x1 − I + Y1 − 2I = 51 − 3I, then x + y=______ ．
• 15. The solution of the equation 3x + YK + 2,2x-y = 5 is x > 0, y < 0, and the value range of K is obtained 3x+y=k+2
• 16. Given the set P = {(x, y) | y = k}, q = {(x, y) | y = ax + 1}, and P ∩ q = ∞, then the value range of K is () A. （-∞，1）B. （-∞，1]C. （1，+∞）D. （-∞，+∞）
• 17. Given that the set P = {(x, y) │ y = k, X ∈ R, K is constant}, q = {(x, y) │ y = (a ^ x) 1, a > 0, a ≠ 1, X ∈ r}, P ∩ q = has only one subset, then the value range of K?
• 18. Given xy = K + 13, X and Y () A. Negative proportion B. positive proportion C. out of proportion D. not sure
• 19. Xy = K + 3, when k is constant, X and y_ C = 3.14d, when C is constant, 3.14 and D_ Proportion
• 20. If xy = K + 1 / 4, is x proportional to y when k is constant? Such as the title