你可能感兴趣的试题
The technological significance of the program. The educational significance of the program. The philosophical significance of the program. The historical significance of the program.
has been selected had been selected has selected selected
I only Ⅱ only I, Ⅱ and Ⅲ all included Ⅰ and Ⅱ only
to live, living live, lives living, to live lives, living
Because previous seals all failed. Because it was very complex in running the space program. Because great care has to be taken of the hydraulic fuel pump sealing. Because any crack in the seals would cause disastrous results for the astronauts.
has been asleep has fallen asleep has gone to bed has gone to sleep
Fresh members from the academic world participate in the program. The program brings new outlooks to NASA space programs. It is important for the space scientists to exchange information and perspectives. American colleges and universities are a special property of NASA
ever Jim gets ever has Jim get ever Jim may get ever does Jim get
ever Jim gets ever has Jim get ever Jim may get ever does Jim gel
Fresh members from the academic world participate in the program. The program brings new outlooks to NASA space programs. It is important for the space scientists to exchange information and perspectives. American colleges and universities are a special property of NASA
Because previous seals all failed. Because it was very complex in running the space program. Because great care has to be taken of the hydraulic fuel pump sealing. Because any crack in the seals would cause disastrous results for the astronauts.
enjoys watching enjoy watching enjoy to watch enjoys to watch
I only Ⅱ only I, Ⅱ and Ⅲ all included Ⅰ and Ⅱ only
The technological significance of the program. The educational significance of the program. The philosophical significance of the program. The historical significance of the program.
has been to has gone to have gone to have been to
has been asleep has fallen asleep has gone to bed has gone to sleep
湘公网安备 43130202000226号