问题 单项选择题 A1型题

一项乳腺癌筛检试验在400例经活检证实为乳腺癌的妇女及400名无乳腺癌的妇女中进行,试验结果100例病例及50例正常妇女试验了性。这个试验的误诊率为()。

A.350/400=87.5%

B.300/400=75.0%

C.100/400=25.0%

D.100/300=33.3%

E.50/400=12.5%

答案

参考答案:E

选择题
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SOCCER
TOURNAMENT
Final Match Sunday
--------------2p.m.-------------
Will the local team make it all the way to the end ?
Find out more by calling
------------368-6061------------

FATHER’S DAY
BIG SALE
Friday 6-9 p.m.
EVERYTHING 50% OFF(降价)
?Make your dreams come true and save time and money .
?Fall in love with prices you can afford .

Monday to Saturday
BIG HITS CINEMA
Movies every night at 7
Actress of the week : Michelle Yeoh
Harry Potter children’s show
Saturday at 2 p.m.       TEL: 753--1307

Give Your TV a Break !
Annual TV-Turnoff Week March 20-27
Join 2.5 million families who will have time to do these things together this week .
take a walk    go to a basketball match
listen to music
talk about their dreams
If you want take part , telephone 609-4377 or fax a form to 609-3744 before March 18th !
There is no fee to register your family .
1.If you want to take part in Annual TV-Turnoff Week , please telephone ______ .
A. 609-4377        
B. 368---6061      
C. 609---3744    
D. 753---1307
2. The final soccer match is ______ .
A. at 2 p.m. on Saturday
B. at 2 p.m. on Sunday
C. at 8 p.m. on Friday
D. at 3 p.m. on Monday
3. People can’t ______ in Annual TV---Turnoff Week .
A. talk about their dreams    
B. take a walk    
C. listen to music    
D. have a picnic
4. There is a T-shirt which is $100 at New Mart Mall . You should pay ______ if you want to buy it at 7
p.m. on Father’s day .
A. $ 40          
B. $ 60        
C. $50        
D. $ 70
5. Which movie star can you see on Saturday night ?
A. Michelle  Yeoh    
B. Jackie Chen    
C. Gloria Green    
D. Rowan Atkinson