1, what is a drug?
Drugs refer to opium, heroin, methamphetamine (ice), morphine, marijuana, cocaine and other addictive narcotic drugs and psychotropic substances.
2. What are the hazards of drugs?
Drugs do great harm to physical and mental health. Drug abuse will cause serious damage to body function, cause various diseases and even cause cancer. At the same time, drug abuse will also have a great negative impact on family, society and environment.
3. Why is there a drug problem?
The emergence of drug problems is mainly due to psychological pressure, spiritual emptiness, family problems, social problems and so on. Some people seek excitement, excitement or escape from reality by taking drugs.
Knowledge expansion
Examination is a strict knowledge level appraisal method. The purpose is to check students' learning ability and knowledge reserve. Exams are usually accompanied by mandatory requirements. Examination has existed since ancient times, has continued to this day, and has gradually developed into a specialized subject, also called examination.
There are many forms of examination, and written examination is the most commonly used one. The written test is usually conducted in a specially designed examination room, and candidates need to answer the questions on the test paper with pencils or ballpoint pens according to the requirements of the questions. Besides written examination, there are other forms such as oral examination and interview.
Oral test is a test method to examine students' oral expression and communication ability through face-to-face communication between examiners and candidates. Interview is an examination method to evaluate candidates' comprehensive abilities such as knowledge level, professional skills and personal qualities through face-to-face communication between examiners and candidates.
The origin of examination can be traced back to the ancient imperial examination system. In ancient China, the imperial examination system was the main way to select officials. It selected talents through examinations of different subjects.
This system has gradually developed and been widely used in various fields, including education, recruitment, promotion and so on. In the west, ancient Greece and Rome also had similar exams. With the passage of time, examination has gradually become a universal knowledge level test method in the world.
In a word, examination is an important method to evaluate the level of knowledge. It can not only help us understand our own knowledge and shortcomings, but also help us improve our learning ability and comprehensive quality.