第5题: [单项选择]特发性血小板减少性紫癜发病相关因素是( )。 A. 免疫因素:机体产生抗血小板抗体 B. 骨髓因素:骨髓造血功能衰竭 C. 凝血因素:凝血因子缺乏 D. 小血管的变态反应性炎症 E. 凝血和纤溶失衡 参考答案:A 答案解析:[考点] 特发性血小板减少性紫癜的病因及发病机制
[重点等级] ★
A. when I became aware of my foolishness B. when my foolishness became obvious C. that did I realize my own folly D. that I became aware of my own foolishness 参考答案:D 答案解析:强调句。强调句采用“It is(was/will be)+强调部分+that+剩余部分(用陈述句语序)”的结构。