Jenny has sent me a very___________ letter explaining why shedidn’t do what she had promised. (apology)
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You must realize that such _____________cannot be tolerated. (obey)
I have never worked for such a considerate employer; I think all the other__________ have the same opinion (employ)
Without your ______________he would never have been able to do it. (courage)
进行生存分析时,不属于截尾数据的是( )。
A. 随访期内死于本病者
B. 随访期内死于其他病因者
C. 随访结束时仍存活者
D. 随访期内找不到者
E. 随访期内拒绝应答者