皮皮学，免费搜题
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【单选题】
心室肌细胞的生理特性不包括下列哪项A.
自律性
B.
兴奋性
C.
传导性
D.
收缩性
E.
以上都不具有
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Which of the following statements about homeotic genes is INCORRECT?
A.
Homeotic genes were first identified in invertebrates, but their homologs were found in almost all organisms.
B.
All homeotic genes contain consensus sequences that result in a specific DNA-binding motif.
C.
In vertebrates, homeotic genes are organized into two distinct clusters.
D.
All homeotic genes encode transcription factors that direct further gene expression.
E.
Homeotic genes exhibit a relationship between their order on the chromosome and the timing of their expression.
【简答题】简述贯彻教学的循序渐进原则的基本要求。
【简答题】简述循序渐进原则及其贯彻的基本要求。
【单选题】Which of the following statements is true according to the passage?
A.
Genes may contribute to some common diseases.
B.
Environmental factors cause more diseases than genes.
C.
It is common that most fatal diseases are caused by genes.
D.
It is impossible to get clear-cut genetic answers at present.
【单选题】Which of the following statements is true according to the text?
A.
Genes may contribute to some common diseases.
B.
Environmental factors cause more diseases than genes.
C.
It is common that most fatal diseases are caused by genes.
D.
It is impossible to get clear-cut genetic answers.
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