【C16】A．diagnosesB．medicinesC．answersD．keys

【C16】A．smallB．littleC．bigD．large

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【C16】A．curiouslyB．negativelyC．necessarilyD．comfortably

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【C16】A．strongB．particularC．extraD．extraordinary

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【C4】A．respondsB．repliesC．answersD．corresponds

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【C9】A．reactionsB．responsesC．answersD．replies

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【C16】A．itB．themC．themselvesD．／

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PKI是（)。A.Private Key InfrastructureB.Public Key InstituteC.Public Key InfrastructureD.

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