I Really Don't Know This Question

[20200620] 1. Xx met a netizen. When doing advanced mathematics homework, she complained a few words that advanced mathematics was too difficult and she couldn't even use Lagrange. The netizen explained it clearly in a few words, better than her roommate who is a top student. At this point it was out of control. The night before her final exam in electrodynamics, she couldn't even memorize Maxwell's equations. Half an hour later, the phone rang, indicating it was him. After the call was connected, the voice on the other end was low and sexy: "Come down and I'll teach you." There seems to be a deer bumping around in xx's heart. 2. YY met a squeamish little girl. In order to prevent her from failing the exam, He picked up the professional courses that he had not touched for many years and lectured her on them. Finally, she had to ask him all the questions she didn't know. Just when he felt that the little girl was becoming more and more dependent on him... And becoming more and more inseparable from him. He gradually discovered that he seemed to be just a high-level author! Industry! Help! #I want to chase you, but you treat me as your homework helper? ! # [Food Guide]1. Sc 2. Sweet text 3. Mission: Rejuvenate the country through science and technology! ! !