关节脱位的特有体征
A．疼痛与压痛
B．反常活动
C．运动消失
D．关节面外露
E．弹性固定
参考答案：E
写出集合{0，1}的所有子集φ，______．
—Would you like to go to the supermarket? —___________.
A．Yes, I’d like
B．Yes, I’d like to
C．Yes, I do
D．No, I am very busy
