The incidence of this disease has been greatly reduced thanks to our health care program.

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问题 The incidence of this disease has been greatly reduced thanks to our health care program.

选项 A、seriousness
B、frequency of occurrence
C、mortality
D、cure rate

答案B

解析 本题中,incidence的意思是“发生(率);影响;影响的方式[范围,程度]”。四个选项中,frequency of occurrence的意思是“发生频率”;seriousness的意思是“严肃,认真”;mortality的意思是“死亡率”;cure rate的意思是“治愈率”。只有B项符合题意。
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