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跟太空人一樣,病毒RNA無法裸身四處移動,它需要被包覆在殼體中。殼體保護RNA免於遭受人類組織中的危險(例如核糖核酸酶),並會引導病毒RNA前往目標細胞。具有殼體是非常重要的事,所以病毒RNA會運用它有限基因體中的一部分,來編碼出可與RNA組裝形成殼 ...
緊貼美國十年期國債債券報酬率的即時及歷史數據。The yield on a Treasury bill represents the return an investor will receive by holding the bond to maturity.
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