若相关系数r=0.9999，说明x与y之间的关系为（）。
A、无关
B、非线性相关
C、完全正相关
D、正相关
参考答案：D
Hardly ______ to the airport ______ he was surrounded by many journalists and fans.
A．the famous singer had got;" when
B．the famous singer got; then
C．had the famous singer got; when
D．did the famous singer get; then
流行性出血热早期症状是发热、“三痛”（头痛、腰痛、眼眶痛）、“三红”（颜面、颈、上胸部潮红）、皮肤黏膜及肾脏损害等。（）
