单项选择题
A.8000/1000,000 B.10,000/1,000,000 C.8000/990,000 D.10,000/990,000 E.9,800/990,000
A.60/1000,000 B.140/2000 C.200/8000 D.140/10,000 E.200/10,000
A.87.5% B.67% C.25% D.33% E.12%