20 10 is the math problem in Heilongjiang college entrance examination difficult?
This year's problem is quite difficult, and it has been difficult for three consecutive years. This year, Ningxia Hainan Volume was saved, which used to be a national volume, so some key points are different. It is not the key knowledge point of the national volume, but it may be the key point of the Ningxia volume, so many of them are very crude, but everyone is difficult and fair.