正五边形的内角和等于______度．
540
过正五边形五个顶点，可以画三条对角线，把五边形分成3个三角形
∴正五边形的内角和=3*180=540°
----I went fishing with my father last Saturday and we watched a funny cartoon at night.
----_________pretty good!
A．Sounds like
B．Sound like
C．Sound
D．Sounds
诊断沙眼衣原体，下列哪项方法是错误的()
A．鸡胚卵黄囊接种分离衣原体
B．细胞培养分离衣原体
C．直接免疫荧光法检测衣原体抗原
D．测血清衣原体1gM、1gG抗体
E．眼底荧光显微镜检查
