大学里面我是过程装备与控制功能材料专业的，现在...

Why are the lions in the Git Forest especially vulnerable to disease?

A．They are physically weaker than the African lions.

B．They are small in size.

C．They do not have enough to eat.

D．They have descended from a dozen or so ancestors.

What does the author mean by the word "progress" in this passage?

A．Urbanization.

B．Economic growth.

C．Cultural development.

D．Increase of population.

The Americans won the war of independence in the decisive battle at ______.

A．Boston

B．Yorktown

C．Norfolk

D．Pittsburgh