在口腔健康调查中，选择样本人群的方法不正确，造成调查对象的代_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

在口腔健康调查中，选择样本人群的方法不正确，造成调查对象的代表性差的是

A．无应答偏倚
B．回忆偏倚
C．选择性偏倚
D．信息偏倚
E．检查者偏倚

答案

参考答案：C

填空题

从方框中选词，并用其

there be, have got, some, friend, photo

Dear Jenny,
        Thank you for your last email. How is everything in China? How many students 1. _____ in your class? Have
you got    2._____ new friends? I 3. _____ a new teacher-Mr Green. His daughter and son are my good 4. _____ .
Do you like China? Do you like your school? Please send(发送)an email to me and send me some 5. _____ of your
school. Thanks.
                                                                                                                                                                                       Yours,
                                                                                                                                                                                        Bill

问答题简答题

简述目前银行对客户挂牌汇价的管理要求。