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【简答题】
生命的结构层次有( )、细胞器、( )、组织、器官、系统、( )、( )、( )和( )。其中( )是生命的结构和功能的基本单位;( )是物种存在的单位;地球上最大的生态系统是( )。
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皮皮学刷刷变学霸
举一反三
【简答题】从风险的角度分析，证券市场也是风险的直接交换场所。( )
【简答题】钠泵的化学本质是 ,其作用是将细胞外液中的 离子逆浓度差转运到细胞内液中,同时将细胞内液中的 离子逆浓度差转运到细胞外液中。
【单选题】My English is very poor. I can't learn it well ___ you help me.
A.
if
B.
unless
C.
while
D.
when
【单选题】— Kangkang, what`s this in English? — Sorry. I don`t know. My English is very _______. [ ]
A.
nice
B.
poor
C.
good
【单选题】Considering the strengths and weaknesses of molecular data, what could one NOT argue to be true?
A.
Molecular methods can be used in all organisms since they all have proteins and DNA.
B.
Molecular data are not easily quantifiable, ysis somewhat subjective.
C.
Molecular methods can access a large amount of data.
D.
Molecular data can provide direct information on the process of evolution.
E.
Molecular variation is clear and interpretable, even if the relationship between some traits and their underlying genes is complex.
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