1. Body fluids account for 65% to 70% of human body weight, of which blood only accounts for about 7% of human body weight; The content of drugs (including alcohol) in blood is roughly the same as that in body fluids.

2. After drinking two bottles of beer in a short period of time, people weighing about 70kg measure their blood alcohol content (mg/ 100ml) at regular intervals. The data are as follows:

Time (hour) 0.25 0.50.751.1.522.533.544.55

Alcohol content 30 68 75 82 82 77 68 68 58 5150 41

Time (hours) 67891013141516.

Alcohol content is 38 35 28 2518151210 774.