未知题型 某机关年终考核时，群众对周、吴、郑、王四位处长的考核结果有多种说法，其中，只有一种说法是正确的，①如果周处长考核优秀，那么吴处长考核也优秀；②考核优秀者是郑处长：③考核优秀者是周处长，但吴处长考核不是优秀；④考核优秀者是周处长或王处长。以下哪项一定为真?

多项选择题 根据投资主体性质的不同，我国上市公司股票的种类有（　　）

未知题型 According to the passage, biometrics_____'A.can make a recording of a person's eye pattern by scanning his eyesB.can provide a more accurate identification of a person by scanning his iris than the finger print recognition systemC.is a newly developed technology that can help analyze personal informationD.involves recognition techniques that are extremely sophisticated but very expensive