We know from the text that the Mars mission is _____. [A] one of NASA’s internet p

WeknowfromthetextthattheMarsmissionis_____.

［A］oneofNASA’sinternetprojects

［B］anexpeditiontoMars

［C］theinfrastr uctureoftheinterplanetaryInternet

［D］tocreateanarchitectureonMars

本题考查词义的理解。文章五、六段中Marsmission和Marsexpedition交替使用，可见是同义，而且第三段首句在具体解释spacemission的含义时以火星为例指出它orbitinganotherplanetsuchasMars。所以，正确选项为[B]。［A］、［C］、［D］三项都指的是塞尔夫跟（美）国家宇航局的合作项目。Architecture意为“架构，体系(thestr uctureofacomputersystemandthewayitworks)”。