United States citizens are now enjoying better dental health, as shown by the declining ______of tooth decay.

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问题 United States citizens are now enjoying better dental health, as shown by the declining ______of tooth decay.

选项 A、accidents
B、incidence
C、prominence
D、consequence

答案B

解析 本题考查名词语义搭配。本题后半句意为“如龋齿的______下降所示”,通过逻辑分析可知所缺名词应为“发生率”,而四个选项中只有incidence符合题意。其余三项accidents(事故,意外事件),prominence(突出,显著),consequence(结果;重要性;推论)皆不符合题意。
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