"I'll talk about the algorithm of this question again, you must pay attention to listening, if you don't understand something, you must ask, otherwise if you make a mistake in solving the problem again, you still have to copy it 50 times according to the old rules." Li Tong struck the small stone slab lying on the window edge with the stone wall, and his eyes were full of sternness.

"Ahh I'll have to copy it fifty times. Third brother, don't do it, less will be successful, this question is too difficult to calculate. "Jiang Tian, who has been punished for copying four times

"Quadrangle: I am the same age as Jia Terrier" Chapter 90 "Little Trumpet" is in the middle of the hand, please wait a while,

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