1. Which of the following items are not drugs? Answer: Alcohol.

2. Has the problem become a public nuisance in today’s world? Answer: drugs.

3. Which of the following substances is a drug? Answer: Poppy shells.

4. Does methamphetamine belong to? Answer: stimulants.

5. Will long-term opium smoking cause loss of life? Answer: Immunity.

Extended information:

There are many types of drugs, with a wide range and different classification methods.

From the source of drugs, they can be divided into three categories: natural drugs, semi-synthetic drugs and synthetic drugs. Natural drugs are drugs extracted directly from the original drug plants, such as opium. Semi-synthetic drugs are synthesized from natural drugs and chemical substances, such as heroin. Synthetic drugs are manufactured entirely using organic synthesis methods, such as methamphetamine.

From the perspective of the effects of drugs on the human central nervous system, they can be divided into inhibitors, stimulants and hallucinogens. Depressants, such as opiates, depress the central nervous system and have sedative and relaxing effects. Stimulants can stimulate the central nervous system and make people excited, such as amphetamines. Hallucinogens, such as mescaline, can cause hallucinations, self-distortion and dissociated thinking.