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树突状细胞处理内源性抗原的特点是
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OnhisfirsttriptoNaples,awell-meaningAmericantouristthankshiswaiterforagoodmealwell-servedbymakingthe"A-Okay"gesturewithhisthumbandforefinger.
Thethumb-and-forefinger-in a circlegesture,afriendlyoneinAmerica,hasaninsultingmeaninginFranceandBelgium: "You'reworthzero,"whileinChinaandJapanitisaninsultingorvulgarsexualinvitation.
"Thumbsup" isalwaysapositivegesture in all the countries.
Anemblemisaphysicalactthatcanfullytaketheplaceofwords.
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