How to understand superposition states in quantum [quantum computing]

Introduction

If I read the first article of the [quantum computing] quantum computing commonly used high-frequency word collection students should feel very puzzled, what is the superposition state is a ghost.
According to the above explanation:
State superposition principle (superposition principle): If the quantum state of a quantum system can be any of several different quantum states, their normalized linear combination can also be its quantum state. This linear combination is called "superposition state". Assuming that several quantum states of the superposition state are orthogonal to each other, the probability that the quantum system is in one of the arbitrary quantum states is the absolute value squared of the corresponding weights. Experiment

For plain English, for example, we do one of the following experiments (thought experiments in the MIT course).

A white w particle, by testing the hardness of the H box there are two ways to go. If the particle property is H-hard, then one upward, through the mirror through a special device, and then from the Color test box C out. If the particle property is S soft, then one to the right, passing through the mirror through a special device, and then from the Color test box C out.
Then, according to the act of the Microcosm quantum W, it is neither the upper nor the bottom of the walk. It's not just two roads away. But this particle does not walk any road alone, it seems to have ubiquitous in general, both roads have the possibility of walking, and the probability is 50%.

Well, a lot of students will ask, after all, just a particle, I open the device to see if it is a one-time two to go. As a result, particles only go one way after observation. That would refute the above-mentioned conclusion error. Here we have to mention a special attribute of quantum, that is, its own property is affected by the observer. If there is an observer throughout the course of the action, the result will collapse into a classic behavior, then the two roads above are not 50% likely to have gone one.
It is this feature that makes quantum so special that it also makes the superposition state of quantum seem mysterious. Conclusion

The so-called quantum superposition state is dynamic when it is not observed, as in the above experiment, the state of a quantum w can be both hard h and soft s, its color can be white w also can be black B, its probability has a certain value. At the time of being observed, the particles themselves will collapse into one of the observed properties, that is, the probability will collapse into 100% and become dominant into a particular state.
In the box of a chestnut, a cat-abusing man Schrodinger, the cat was dead and alive at the time of the unobserved. But when we go to the observation, the cat must be either dead or definitely alive. Will not be in the verdict of this mysterious state. Laugh