We can do      things with       money and       people.

A．more, more, more

B．more, less, fewer

C．less, less, less

D．less, more, less

罹患率适用于

A．慢性病
B．疾病的长期流行
C．较小范围或短期流行
D．某病的隐性感染
E．以上都不对