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At minus 130℃, a living cell can be ______ for a thousand years.

   A. spared  B. protected    C. preserved   D. developed

At minus 130℃, a living cell can be ______ for a thousand years.

   A. spared  B. protected    C. preserved   D. developed

At minus 130℃, a living cell can be ______ for a thousand years.

   A. spared  B. protected    C. preserved   D. developed

 At minus 130℃, a living cell can be ______ for a thousand years.

   A. spared     B. protected     C. preserved     D. developed

At minus 130℃, a living cell can be ______ for a thousand years.

A. spared        B. protected           C. preserved          D. developed

At minus 130℃, a living cell can be ______ for a thousand years.

A. spared B. protected    C. preserved   D. developed