How do new technology (tools) and new innovations (ideas) improve and harm the world?

What is one reason the united states had a two party system

What was an immediate result for japan after world war i?       a.  a boosted economy      b.  a slower economy      c.  a weakened military      d.  less territory controlled by japan

Why were chinese american immigrants frequently detained when trying to immigrate through angel island? the rules for immigration were stricter at this checkpoint due to health issues that were prevalent among asian populations at this time. the location of the island was difficult to reach, and ships to the mainland were often prevented from sailing more than once a week. immigration agents were notorious for asking immigrants confusing questions as a means of denying them entry. low wages caused a shortage of immigration officials, so many immigrants had to wait weeks or months before their applications were processed.