Cancer is one of the diseases that seriously threaten human health. Which of the following descriptions is correct?
A. Long-term exposure to cancer patients increases the risk of cancerous cells in human cells
B. Cancer is caused by carcinogens, and the risk of disease has nothing to do with age
C. Nitrite can cause cancer by changing the structure of genes
D. AIDS patients have the same risk of developing cancer as normal people
Answer:C
Cancer is one of the diseases that seriously threaten human health. Which of the following descriptions is correct?
A. Long-term exposure to cancer patients increases the risk of cancerous cells in human cells B. Cancer is caused by carcinogens, and the risk of disease has nothing to do with age C. Nitrite can cause cancer by changing the structure of genes D. AIDS patients have the same risk of developing cancer as normal people