Nwhat sense is it now possible for a country to be “occupied” by an invisible invader that arrives through airwaves and wireless networks? a. it is almost impossible to block foreign countries’ satellite broadcasts and internet transmissions. b. spy satellites and other communications technology are increasingly advanced. c. global positioning systems have allowed detailed mapping of previously inaccessible places. d. the u. s. government can eavesdrop on almost any form of modern communication.

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.