题目 travelers from earth to mars would have to endure low levels of gravity for long periods of time ,avoiding large doses of radiation,plus contending with the chemicallly reactive martin soil,and perhaps even ward off contamination by martian life-form.
这句话错的，因为平行原因，答案还说plus is not a coordinating conjunction.
有大神能解答吗 plus 不能作为连词使用的嘛？但我查百度plus有conj的用法耶。？？
travellers from earth to mars , who would have to endure low levels of gravuty for long periods of time,avoid large doses of radiation , contend with the chemically reactive martian soil,and perhaps even ward off......
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发表于 2019-8-21 13:11:47
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