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【单选题】
以下关于精子形成的描述中,哪一项错误?A.
细胞核染色质极度浓缩，核变长并移向细胞一侧形成精子头
B.
复合体形成顶体
C.
中心粒发出轴丝，形成精子尾（即鞭毛）
D.
线粒体汇集于轴丝中央，形成线粒体鞘，分布于全尾部
E.
残余胞质脱落
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皮皮学刷刷变学霸
举一反三
【单选题】What's the advantage for the people who join the co - up for 6 month period?
A.
The membership fee is lower.
B.
They can help chouse the products that will be sold
C.
They may attend fewer meetings.
D.
They may go to the co - up more times per week.
【简答题】Readers are not allowed (bring) _____ ______ ___ food and drinks into the l ibrary at any time.
【单选题】What's the advantage for the people who join the co - up for 6 month period?
A.
The membership fee is lower.
B.
They can help choose the products that will be sold.
C.
They may attend fewer meetings.
D.
They may go to the co -up more times per week.
【简答题】This book belongs in the technical ibrary of anyone involved in the field of electronics.It provides the basic theory, components, devices, circuits, and systems of electronics. Not only does this boo...
【单选题】Retum the book immediately to the 1ibrary as soon as you_______with it.
A.
finish
B.
are finished
C.
have finished
D.
are finishing
【多选题】要调查某地区养鸡专业户的养殖经营情况，以下哪些是可选用的指标？
A.
养鸡专业户的户数
B.
每一养鸡户的养鸡数
C.
养鸡专业户的养鸡数
D.
每一养鸡户的年收入
E.
养鸡户的平均年收入
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【简答题】Readers are not allowed (bring) _____ ______ ___ food and drinks into the l ibrary at any time.