As observed in the market, it is easy to see that some online training service providers, regardless of form, training institutes, companies and centers also use Internet teaching as a channel. teaching and learning "secondary" besides the main "traditional" teaching method (direct classroom learning) and the interaction is not high or has not fully exploited the benefits of learning via the Internet. Accordingly, these companies invest most of their resources into the traditional channel. There are many reasons for this situation. However, it can be considered from two main angles.

Over the past few years, the health sector has developed fast development, bậc, that is because of a minor role in research, application of kh&cn to preventive medicine, medical care, drug production, supplies and medical equipment. With the assistance of the equipment used in modern technology, many new techniques have been applied to medical examination, health work, pharmaceutical production - supplies. The 4d ultrasound technique has given the imaging discipline to a new position, helping the doctor observe the ảnh organs in a three - dimensional space with real - time, doppler - doppler - doppler, which has become an indispensable probe for the heart - to - heart process. New tự in laser technology are strongly applied in surgery, treatment of liễu skin, traditional medicine, functional rehabilitation with the help of modern optical equipment, diagnostic techniques, surgical soi, and health rehabilitation for patients with advanced diagnosis and recovery. The digital circuit scanner deletes the background, the chúp hưởng is the result of scientific scientific achievements in many fields: physics,. .... information technology has supported the diagnosis of a variety of bone - related diseases,  cardiovascular