Drugs：练习题

• a.The bacteria causing these diseases have developed total resistance
• b.Antibiotics can only be used to treat infections in the digestive system
• c.These diseases are caused by viruses, which are not affected by antibiotics
• d.These diseases are caused by human cells reacting to cold weather

• a.By using antibiotics only when they are essential
• b.By stopping the course of antibiotics as soon as symptoms disappear
• c.By increasing the frequency of antibiotic use in livestock feed
• d.By using antibiotics for all viral infections to prevent secondary growth

• a.

  Antibiotics only work against pathogens that possess a protein coat and genetic material.

• b.

  Antibiotics are only effective against pathogens that have developed resistance, such as MRSA.

• c.

  Antibiotics kill bacteria by disrupting their specific cell processes but do not affect the machinery used by viruses.

• d.

  Antibiotics provide passive immunity by injecting ready-made antibodies into the bloodstream.

• a.A substance used only to kill harmful bacteria and prevent infections
• b.Any natural material that provides energy for cellular respiration
• c.Any substance taken into the body that modifies or affects chemical reactions in the body
• d.A chemical that is produced by the liver to regulate blood sugar levels

• a.They are substances that increase the rate of chemical reactions in the body.
• b.They are used to treat infections caused by viruses.
• c.They kill bacteria but do not affect viruses.
• d.They stimulate the production of antibodies by the white blood cells.

先自己写一遍答案，再对照解题步骤。