What are the problems that I only know after the graduate school entrance examination?

1. Outer space refers to the space area outside the dense atmosphere of the earth, and there is no clear boundary. Outer space is referred to as space dissipation, also known as cosmic space, which refers to the void area outside the atmosphere in the earth's sky, and outer space is usually used to distinguish it from the territorial space (territory); Although it is called void, it is not ethereal, and is generally defined as space about 1,000 kilometers away from the earth's surface. >>>More

Physics is the natural science that studies the most basic structure, the most universal interactions, the most general laws of motion, and the experimental means and thinking methods used in the material world. >>>More

It's not the greenhouse effect, it's just the El Niño phenomenon, right?

When people reach middle age, they are often old and young, and family pressure is also very great, but often some families are estranged from the elderly, have a cold relationship with their lovers, and have a tense relationship between girls, so people should deal with family relationships reasonably when they reach middle age, and in this process, take into account the overall situation as much as possible, empathize, and even bear grievances.

Introduction: Many people say that after you get pregnant, you know who is really good to you. And you can learn a lot of things after pregnancy, let me take it today, everyone knows those things after giving birth. Look at the same as you know. >>>More