美国陆基战略导弹老化:how ___ does Amy ___?she is 43kg.

how ___ does Amy ___?she is 43kg. how does computer works??? how does it feel? how does it feel how does lighting form? how does a clock work? how does a clock work? how does it feel 是什么意思？ How many countries does the mideast include? How does discoloration of fruits take place?