问题
单项选择题
一般女性乳腺癌的患病率约为2/10万，患有乳腺增生的女性乳腺癌患病率约为60/10万。在一般女性中进行筛检，筛检阳性者中0.1%患癌，在乳腺增生患者中进行筛检，筛检阳性者中20%患癌，这说明在患病率高的人群中开展筛检
A．特异度变化不大
B．特异度降低
C．灵敏度降低
D．阳性预测值升高
E．灵敏度变化不大
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
一般女性乳腺癌的患病率约为2/10万，患有乳腺增生的女性乳腺癌患病率约为60/10万。在一般女性中进行筛检，筛检阳性者中0.1%患癌，在乳腺增生患者中进行筛检，筛检阳性者中20%患癌，这说明在患病率高的人群中开展筛检
A．特异度变化不大
B．特异度降低
C．灵敏度降低
D．阳性预测值升高
E．灵敏度变化不大
参考答案：D
阅读下面短文，根据短文内容完成表格中所缺信息，每空一词。 Some birthday customs are quite similar in many parts of the world---- birthday candles, birthday games，and birthday cakes. But some customs are more specific to certain countries. Here are some children talking about their customs. Linda---I am fourteen. I come from Aruba. In our country, Children take something special to school for their classmates and all teachers. Each teacher gives the birthday child a small gift like a pencil, an eraser or a postcard. The birthday child is also allowed to wear special clothes instead of the school uniform. Lucy---I am one year older than Linda. Denmark is my country. A flag is flown outside a window to show that someone who lives in that house is having a birthday. Presents are placed around the child’s bed while they are sleeping so they will see them at once when they wake up. Tom---I am as old as Linda. I am from Brazil. The birthday child receives a pull on the earlobe(耳垂) for each year in my country. The birthday person also gives the first slice of cake to his/her most special friend or relative, usually mom or dad.
|