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问题 选择题

若集合A={x|0≤x≤2}，B={x|x2＞1}，全集U=R，则A∩（CUB）=[ ]

A．{x|0≤x≤1}

B．{x|x＞0或x＜-1}  

C．{x|1＜x≤2}  

D．{x|0＜x≤2}

答案

答案：A

改错题

One cold evening during the holiday season, a little boy about six or seven was standing out in the front of a store window． The little child has no shoes and his clothes were just rags． A young woman passes by saw the little boy and could read the desire in his pale blue eyes． She took the child by the hand and led him into the store． There she bought her some new shoes and a complete suit of warmly clothing．They came back outside into the street, so the woman told the child to come home and have a happy holiday． The little boy looked  her and asked how she was God． She smiled and replied that she was just one of His child．
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单项选择题

续发率是指

A．接触者中二代病例数/接触者总人数×100%

B．接触者中发病人数/接触者总人数×100%

C．接触者中患病人数/接触者总人数×100%

D．同等身份的接触者中发病人数/同等身份人数×100%

E．接触者中二代病例数/易感接触者总人数×100%
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