WeknowfromthetextthattheMarsmissionis_____.
[A]oneofNASA’sinternetprojects
[B]anexpeditiontoMars
[C]theinfrastr uctureoftheinterplanetaryInternet
[D]tocreateanarchitectureonMars
正确答案:B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)”。


![We know from the text that the Mars mission is _____. [A] one of NASA’s internet p We know from the text that the Mars mission is _____. [A] one of NASA’s internet p](http://www.mshxw.com/aiimages/29/23204.png)
