[解析]
(1)细节理解题。根据第二段A new discovery might allow spacecraft to be lighter.A new material called a "carbon nanotube(碳纳米管)" might be the answer to the weight problem of building a super spaceship.This material is 600 times stronger than steel.(一项新发现可能会使宇宙飞船变得更轻。一种被称为"碳纳米管"的新材料可能会解决建造超级宇宙飞船的重量问题。这种材料的强度是钢的600倍。)可知,碳纳米管的特点是又轻便又结实。A.Light and strong轻盈有力B.Thin and radioactive薄而有放射性;C.Self﹣repairing and weightless自修复,失重;D.Sensitive and protective敏感和保护性。故选B项。
(2)推理判断题。根据第四段But we could use carbon nanotubes to make the skins of spacecraft.Things that are light in weight seem to work the best against these ions.The rays are stopped outside the spacecraft and new rays aren't made.(但是我们可以用碳纳米管来做宇宙飞船的外壳。重量轻的东西似乎对这些离子最有效。射线在宇宙飞船外被阻挡,新的射线就无法产生。)可知,碳纳米管能有效地防止辐射。故选D项。
(3)细节理解题。根据倒数第二段Each sensor could send messages to the computer "brain" of the spacecraft.If something needed to be fixed,the computer could tell the ship to do it.(每个传感器都可以向宇宙飞船的计算机"大脑"发送信息。如果有什么需要修理,计算机可以告诉飞船去做。)可知,微型传感器被安装在新宇宙飞船上,可以让计算机知道该修理什么。故选C项。
(4)标题归纳题。根据文章大意,主要讲了美国宇航局制作新宇宙飞船的构想。以及第一段最后一句点明主旨But NASA is trying to make a spaceship that is much better than other ships.( 但是美国宇航局正在努力制造一艘比其他飞船更好的宇宙飞船。)可知,最适合的题目是"美国宇航局试图制造一艘超级宇宙飞船"。故选B项。