题目内容：
Inthelastparagraph,theunderlinedexpression"thesedevelopments"referstoallofthefollowingEXCEPT
A．thedevelopmentofsciencefictionandspecialeffectsoffilms． B．thenewconceptsabouttheuniverseacquiredbytoday'sastronomystudents．
C．theworld-wideinvolvementinspaceexploration．
D．humanity'snewachievementsinthefieldofastronomy．
参考答案：
答案解析：