With a bang, Huang Yan knocked the teaching stick on the platform: “Xiangwan-Wan-stand up, what are you doing!”

Clearly is Qin book to disrupt the classroom discipline, Xiangevening how also did not expect to be named is himself, a face of Meng forced to stand up, pointing to Qin book kindly reminded: “Teacher, Qin book disturbed you ah, you call me up why.”

Huang Yan suppressed her anger and turned her eyes to Qin Shu: “Qin Shu, what I just said.”投票软件

Qin Shu cleverly stood up, looked at the blackboard and said without thinking: “The auxiliary line links cd two points, so that you can find the degree of Angle cde, so that you can also deduce the degree of Angle a, Angle a… “