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【单选题】
细胞凋亡是指为维持内环境稳定,由基因控制的细胞自主的、有序的死亡。图5表示细胞凋亡过程机制示意图,据图推测,下列相关叙述错误的是A.
①过程表明细胞凋亡是特异性的
B.
②过程与细胞膜的半流动性有关
C.
正常细胞中不存在凋亡相关基因
D.
细胞凋亡过程中有新蛋白质合成
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举一反三
【单选题】The Colonial Period of American literature stretched roughly from the settlement of America in the early 17 th century through the end of ________ century.
A.
the 18 th
B.
the 19 th
C.
the 20 th
D.
the 21 th
【判断题】English literature of the 17th century witnessed a flourish on the whole.
A.
正确
B.
错误
【单选题】The Colonial Period of American literature stretched roughly from the settlement of America in the early 17th century through the end of ________ century.
A.
the 18th
B.
the 19th
C.
the 20th
D.
the 17th
【判断题】English literature of the 17 th century witnessed a flourish on the whole .
A.
正确
B.
错误
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