题目

 Everything he ________ away from him before was returned to his hometown. A. took         B.had been taken    C. had had been taken  D. had taken 答案：D埃博拉出血热（EBHF）是由EBV（一种丝状单链RNA病毒）引起的，EBV与宿主细胞结合后，将其核酸﹣蛋白复合体释放至细胞质，通过如图途径进行增殖．如直接将EBV的RNA注入人体细胞，则不会引起EBHF．下列推断正确的是（ ） A.过程②的场所是宿主细胞的核糖体，过程①所需的酶可来自宿主细胞B.过程②合成两种物质时所需的氨基酸和tRNA的种类、数量一定相同C.过程①所需嘌呤比例与过程③所需嘧啶比例相同D.EBV侵染细胞过程与噬菌体侵染细菌过程相同