生活质量测定的内容
A．社会功能
B．日常生活
C．行为失调
D．心理应激
E．躯体健康、心理健康和社会功能健康
参考答案：E
{（x，y）|0≤x≤2，0≤y＜2，x，y∈N}中共有 ______个元素．
— Robert is indeed a wise man.
— Oh, yes. How often I have regretted _____ his advice! [ ]
A. to take
B. taking
C. not to take
D. not taking
