心跳停止60秒时，患者一般出现
A．头晕B．晕厥C．惊厥D．尿便失禁E．瞳孔散大
参考答案：D
用2个正方形与____________ 个正三角形可以进行镶嵌
--- Thank goodness, you are here ! What ____ you ?
---- Traffic jam．
A．keeps
B．is keeping
C．had kept
D．kept
