1. From the propositional point of view, the overall mathematics difficulty of 20 16 is slightly lower than that of 20 15, but it is still difficult to judge the sufficiency of conditions, and more theorems and inferences are needed to get the answer.

2. The logic problem is more difficult than 20 15, but the inspection point of the exam is the transformation between various necessary and sufficient conditions. The topic combines the hot spots of the year, but the test center has not changed.

3. This paper discusses that the validity analysis focuses on the employment of college students and examines the candidates' grasp of the logical relationship of the article. Candidates need to find out the unreasonable places in the article while reading, and the difficulty is not much different from previous years.