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【单选题】
下列关于 σ 因子的描述哪一项是正确( )。A.
是一种小分子有机化合物
B.
负责识别 RNA 模板上的转录起点
C.
可识别 DNA 模板上的终止信号
D.
负责识别 DNA 模板上的转录起点
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反馈参考答案：
举一反三
【简答题】整理坐标指令译码的程序设计 ,绘制流程图并嵌入整个系统,调试直线插补的译码执行效果。
【单选题】Mary is ill today. If she _____ , she ____ absent from school. A. were not ill , wouldn't be B. had been ill , wouldn't have been C. had been ill , should have been D. hadn't been ill , could be
A.
were not ill ， wouldn't be
B.
had been ill ， wouldn't have been
C.
had been ill ， should have been
D.
hadn't been ill ， could be
【简答题】压缩空气初步净化过程气源装置包括( ) 、( )、( ) 、( ) 。
【简答题】a) Shaun says that "lying" and "shooting" is not a causal relationship. Which apporach he has used to make his argument? b) Please apply the notions we learned in thie context. In this story, what do ...
【单选题】下列关于罗格列酮说法错误的是
A.
能有效纠正脂质代谢紊乱
B.
只有在胰岛素存在的前提下才有效
C.
可广泛用于各型糖尿病的治疗
D.
可能发生的不良反应有肝损害、心脏毒性
E.
用药时间并无特殊要求
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