What does the discovery of deep－freeze bacteria mean to us according to the passage？A．We
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What does the discovery of deep-freeze bacteria mean to us, according to the passage？
A．We might one day find form. of life on other planets.
B．Scientists from NASA made a great progress in discovering the microorganisms
C．To retrieve any life that has died long ago is impossible.
D．Alaska is a place abundant in microorganisms.
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正确答案：A
推理题。文章第一段提到“Theexistenceofmicroorganismsintheseharshenvironmentssuggests-butdoesnotpromise——thatwemightonedaydiscoversimilarlifeformsintheglaciersorpermafrostofMarsorintheicecrustandoceansofJupiter"smoonEuropa，”(这些微生物在