单项选择题

Which statement do the researchers think is wrong

A．They know how a tumor is developed.
B．They know how a new tumor is seeded in the body.
C．They know how the female hormone estrogen makes breast cancer cells grow.
D．They know breast cancer is a death sentence to women.

<上一题目录下一题>

热门试题

单项选择题

Which statement cannot be inferred from the passage

A．The mortality rate for breast cancer dropped.
B．The mortality rate among black women has increased.
C．The number of reported breast cancer cases is rising.
D．A woman's lifetime risk of breast cancer is risin

单项选择题

The tone of the passage is ______.

A．scientific and factual
B．vague and imaginative
C．curious and enthusiastic
D．worried and pessimistic