Atminus130°C,alivingcellcan     forathousandyears.A.pr...

問題詳情：

 At minus 130°C, a living cell can      for a thousand years.

A. preserve                      B. be preserved          C. be preserving        D. have been preserved

【回答】

知識點：虛擬語氣與情態動詞

題型：選擇題