why hAvE thEAmEriCAns DEvElopED spACE shuttlE ACCorDing to thE pAssAgE
why hAvE thEAmEriCAns DEvElopED spACE shuttlE ACCorDing to thE pAssAgE
A、it is A First stEp to ExplorE outEr spACE.
B．it is A Follow-up ACtion oF thEApollo moon lAnDings.
C．it is A CompromisE to thE ExorBitAnt humAn ExpEDitions to thE mArs.
D．it is A CompEnsAtion For thE wishFul thinking oF humAn lAnDing on thE mArs.
A、it is A First stEp to ExplorE outEr spACE.
B．it is A Follow-up ACtion oF thEApollo moon lAnDings.
C．it is A CompromisE to thE ExorBitAnt humAn ExpEDitions to thE mArs.
D．it is A CompEnsAtion For thE wishFul thinking oF humAn lAnDing on thE mArs.