Comparing the u. s. economy today to that of 1950, one finds that today, as a percentage of gdp,
a. exports and imports are both higher.
b. exports and imports are both lower.
c. exports are higher, and imports are lower.
d. exports are lower, and imports are higher.

The biggest component / ingredient of summer time smog is

Roman builders used rows of arches in there buildings to form a curved ceiling called what

Before they can be published, scientific papers must be peer-reviewed. this means that: a) some other scientific experts read the papers and guarantee that they are true.b) some other scientific experts read the papers and provide quality control by eliminating many mistakes.c) an editor reads the papers, to make sure that all the semicolons are in the correct places.d) everyone in the world is given the opportunity to comment on the papers through a specially maintainedblog.e) government bureaucrats read the papers, to be sure that the papers do not insult the political positions ofthe current officeholders.