The distance from earth to the sun, as measured at 149,597,870.691 kilometers, is called
a. the earth/sun continuum.
b. an astronomical unit.
c. the speed of light.
d. an orbital distance.

What type of government does costa rica have?

What is the name of the ocean current that affects the british isles? how does it influence their climate?

Which of the following events did not occur as a result of china’s open-door policy? a. trade between japan and china was encouraged. b. all countries were given equal access to chinese ports. c. foreign influence in china increased. d. the influence of the communist party weakened.