A: What’s the date today
B: It’s June 16.
A: (16) Then it’s Dragon Boat Festival today, isn’t it
B: Yes. (17)
A: Did you have rice dumplings this morning
B: Sure. (18)
A: I didn’t.
B: What a pity! But I happen to have got some with me. (19)
A: I’d love to. By the way, why do you call it Dragon Boat, Festival
B: Because in China, people race dragon boats this day every year.
A: Oh, I see. (20)
B: You are welcome.
A．We Chinese usually eat rice dumplings this day
B．I hate eating rice dumplings.
C．Thank you for your rice dumpling.
D．I don’t think so.
E．Would you like to have one
F．Already
G．How about you

正常人血糖约在（80～130）mg／100ml范围内，而糖尿病病人血糖多数在110～180mg／100ml范围内，据此你认为

若将筛检阳性标准确定在130mg～100ml，则（）

A.灵敏度高，特异度低

B.灵敏度低，特异度高

C.灵敏度低、特异度均高

D.灵敏度低、特异度均低

E.假阳性率高、假阴性率低