3 . Have you watched the recent TV Three-Body? Changed by Liu Cixin’s science book The Three-Body Problem, the show is very popular with people. One of the most exciting parts must be Operation Guzheng.

In order to find the important information of a huge ship, people plan to cut the ship into pieces. They set up many thin strings （线） across the river, the strings quietly cut the steel ship into pieces as if the ship was soft tofu!

Is it possible to cut ships with thin strings in real life? In fact, strings are very good at cutting. For example, the egg cutting machine uses thin strings to cut eggs into pieces. A kite line can easily hurt people if it gets circle around their necks. This is because the thin strings have a very small contact area（压强） when they cut things.

In the program, the strings are as thin as human hair. To cut the ship, the pressure needs to be 200 MPa. How strong is that pressure? Imagine an elephant standing on a string! In real life, scientists won’t be able to make such thin strings that wouldn’t easily break, at least for years to come. The cutting will also create lots of heat. We don’t have the things to bear.（忍耐）

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8 . Many people like to watch TV. It is one of the important activities of a day. TV brings the outside world closer to people’s homes. Some people say the world is now smaller than before because of TV. Perhaps they are right.

What’s going on in other countries? What’s the life like in the deepest parts of the sea? Well, just turn on the TV. Turn it on and watch. You can see a lot and you can learn a lot. Of course, people can also learn through reading or listening to the radio. But with TV they learn better and more easily. Why? Because they can hear and watch, too. TV helps to open our eyes. TV also helps to open our minds. TV often gives us new ideas. We learn newer and better ways of doing things.

10 . TV has already entered thousands of households, and TV is a window. For primary school students watching TV can make them understand the important events at home and abroad, open their eyes, and get knowledge. Besides, they have been very nervous at school. After getting home, it is very necessary to relax. And watching TV is a very good way. When some programs are educational, they have both fun and increased knowledge. TV gives primary school students the growth and development of brains. We asked 1,000 students from different schools. The following are the results of the survey about what kind of TV programs students prefer.

In modern society, it is impossible and it is not necessary to stop children from watching TV. But to guide them to choose good programs, to choose proper time, and even to see the suitable programs together, you can discuss with them, and use entertainment to train your child’s mind, enrich your child’s emotions (情感).