In recent years viruses have been shown to cause cancer in chickens. Viruses have also been shown to cause cancer in mice, cats, and even in some primates. Viruses might cause cancer in humans.This is a reasonable hypothesis.
举一反三
- Coronaviruses are a large family of viruses that cause disease in humans and birds.
- When it _____ to the cause of cancer, people seem to have different ideas.
- There is evidence that the acrylamide in potatoes will cause cancer in humans.
- When it ________ to the cause of cancer, people seem to have different ideas. A: matters B: gets C: refers D: comes
- Paragraph 1（） A: How is cancer treated B: Does cancer always cause pain C: Can cancer be prevented D: What is cancer E: How common is cancer F: What causes cancer