Type 1: Every class has 1, so c82=28.
Type 2: 1 Class has 2 classes, then c8 1=8.
Total ***28+8=36 species.
2. Always play the national anthem 8 times.
China and Greece are in harmony, and the Stars and Stripes are excluded by insertion.
The rest are 2 China, 1 Japanese, a total of 4 combinations.
Then insert two Americans into five of them, and the total is p44*p52=480.
3. I. Otsuichi Group, p22
C and d are similar to the last question about the United States, so let's rule it out first.
The remaining groups A, B and E are p22.
Insert c and d into three intermediate positions, p32.
Total ***p22*p22*p32=24 species.
The idea of this problem is: arrange 9 people-A at the head-B at the tail +A at the head and B at the tail.
So P99-P88-P88+P77 = 287,280 species.