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【单选题】
— Could you tell me____________? — Over there.A.
where does Jim live
B.
where Jim lives
C.
when will Jim come back
D.
when Jim will come back
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皮皮学刷刷变学霸
举一反三
【单选题】细胞外液的K + 浓度明显降低时，将引起神经细胞
A.
膜电位负值减小
B.
膜的K + 电导增大
C.
钠泵活动增强
D.
K + 平衡电位负值减小
E.
Na + 内流的驱动力增大
【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。( )
【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, making analysis 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.
【简答题】质粒有4种类型,包括致育质粒(又称F质粒)、毒力质粒(又称Vi质粒)、耐药质粒(又称R质粒)和细菌素质粒。其中,( )编码性菌毛的质粒,与细菌的有性结合有关;( )编码细菌各种毒力因子,如大肠杆菌K质粒编码对黏膜具有黏附活性的菌毛;ST质粒与LT质粒分别编码耐热肠毒素和不耐热肠毒素;( )编码细菌对抗菌药物或重金属盐类的抗性;( )是控制细菌产生细菌素。
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