题目内容
With sufficient scientific information a manned trip to Mars should be _____.
|
A.obtainable |
B.potential |
C.considerable |
D.feasible |
【答案】
D
【解析】略
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题目内容
With sufficient scientific information a manned trip to Mars should be _____.
|
A.obtainable |
B.potential |
C.considerable |
D.feasible |
D
【解析】略