该试验的特异度为()。 A.40% B.50% C.60% D.70% E.80% 发布时间:2018-04-13 16:11 │ 来源:www.tikuol.com 题型:单项选择题 问题: 该试验的特异度为()。A.40%B.50%C.60%D.70%E.80%
题型:单项选择题 My friend Li Xiao knows my hometown very well because he _______ there many times with me.A.has beenB.has gone C.had goneD.went 查看答案