【简答题】They also find it difficult to be pleased by compliments because they believe they are _____________(不值得称赞).
【单选题】The woman's illness ______ the doctors they couldn't find the cause.
【单选题】为了了解某市八年级学生的肺活量,从中抽样调查了500名学生的肺活量,这项调查中的样本是( ▲ )
【单选题】为了了解某市八年级学生的肺活量,从中抽样调查了500名学生的肺活量,这项调查中的样本是 [ ]
【单选题】It will be many years ______the doctors and medical scientists can find _____ for cancer. [ ]
【单选题】为了了解某市八年级学生的肺活量,从中抽样调查了500名学生的肺活量,这项调查中的样本是( )