• A. Harm Screening May Do to a Younger Woman
• B. Investing the Effect of Screening
• C. Effects Predicted by Two Different Models
• D. small Risk of Inducing Cancers from Radiation
• E. Treatment of Cancers
• F. Factors That Trigger Cancers

Paragraph 3 ______

A．Water on Titan exists in the form of ice.
B．There are life clues there.
C．Rivers and lakes there contain life forms.
D．There is acetylene ther

A．Right
B．Wrong
C．Not mentioned