The ratio of adult's blood mass to body weight is about 1:13. Uncle Li's weight is 65kg. How many kg of blood is there in his body

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• 2. If the least common multiple of a and B is 60, then C = 1___ ．
• 3. (log36(4))/log18(6)+log^2 6(3)=
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• 20. The results are as follows: (1), 3.2 * (- 7 / 8) * (- 1.25) * (1 / 7) (2) (7 / 99 / 15) * 30 (3), (- 69 / 15) * 8 Using a simple method to calculate: (1), 3.2 * (- 7 / 8) * (- 1.25) * (1 and 1 / 7) (2) (99 and 7 / 15) * 30 (just two, not the third)