单项选择题

A．Mastectomy used to be considered the only safe course……

Which statement is true according to the passage

A．Mastectomy used to be considered the only safe course.
B．The chances of survival after a mastectomy are greater than after lumpectomy.
C．Mastectomy can decrease the patients' chances of a care.
D．Most women prefer lumpectomy.

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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 rising.

单项选择题Which of the following statements does the passage support

A．The new scheme will eliminate the poaching in national parks.
B．Bushmen are too poorly educated to use modern technology.
C．Use of the CyberTracker will help to preserve rare animals.
D．The new system has doomed the kudu population.