【单选题】【消耗次数：1】
______ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
①
Even if
②
As far as
③
If only
④
So long as
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相关题目
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They _ on the programme for almost one week before I joined them, and now we on it as no good results have come out so far.
①
had been working; are still working
②
had worked; were still working
③
have worked; were still working
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【单选题】
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made
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do
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receive
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①
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随机题目
【判断题】
1999年9月18日，江泽民同志在表彰为研制“两弹一星”作出突出贡献的科技专家大会上发表讲话，将“两弹一星精神”概括为“热爱祖国、无私奉献，自力更生、艰苦奋斗，大力协同、勇于登攀”二十四个字.
①
对
②
错