试题详情

( )is the dividing line between the South and North of America.

The traditional dividing line in America between “east” and “west” is _____.

se of the Civil War was economic and political rivalry between the（ ）South and the industrial North.

Angle of attack is defined as the angle between the chord line of an airfoil and the _______．

There is little rain in the north; ______there is plenty of rain in the south.