The______of smoking among women, formerly negligible, has grown to such a degree that lung cancer has become the chief causer

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问题 The______of smoking among women,  formerly negligible,  has grown to such a degree that lung cancer has become the chief causer of cancer-related deaths among women.

选项 A、affluence
B、ferociousness
C、impudence
D、incidence

答案D

解析 句意:女性吸烟的发生率达到如此高度(这在以前是被忽略了的)以至于肺癌已经成为女性因癌症相关疾病死亡的主要诱因。incidence发生率,具有影响的程度。ferocious极度的,凶猛的。affluence富裕,富足。impudence轻率,厚颜无耻。
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