长方形有______条对称轴，圆有______条对称轴．
长方形有2条对称轴，圆有无数条对称轴．
故答案为：2；无数．
He feels lonely because he has no close friends ____.
A．to talk
B．to talk with
C．talking
D．talking with
耳穴埋籽的留籽时间（）
A.5～10天
B.10天以上
C.每天更换
D.2～7天
