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【单选题】
三联体是指:
A.
横小管和一侧的终纵小管
B.
纵小管和两侧的终池
C.
终两侧的横小管
D.
横小管和两侧的终池
E.
三个横小管组成
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【单选题】急性白血病贫血的主要原因( )
A.
出血
B.
无效性细胞生成
C.
红细胞寿命缩短
D.
红细胞成熟受干扰
E.
造血原料缺乏
【单选题】该病人贫血的原因不包括( )
A.
促红细胞生成素减少
B.
红细胞寿命缩短
C.
造血原料不足
D.
红细胞成熟障碍
E.
水、电解质紊乱
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A.
细胞是一个有机的统一整体
B.
细胞核的功能比细胞质重要
C.
细胞是生命活动的基本单位
D.
环境影响细胞寿命
【简答题】根据短文内容和首字母的提示,把所缺单词填写在短文后面的横线上。 Many students often 1. c______  about school. They might feel they have too 2. m_______ work to do sometimes, or think the rules are too 3. s_______. We must learn how ...
【简答题】成熟的红细胞内无 和 。胞质内充满 ,具有 的功能 ; 红细胞的寿命约为 天。
【简答题】改写后的课文内容填空 (共10个空格,每空1分,满分10分) Many m (1) meet and f (2) a band because they like to write and play their own music. They may start as a group of high school students. Sometimes they may play to passe...
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