【多选题】下列语句和典故体现“自强不息”的民族精神的是( )
【单选题】一般情况下, ________ 是相对规范和不变的,它包含整个技术动作的完整功能和属性。
【判断题】亚里士多德认为生物性是人与动物的本质区别。( )
【单选题】某集线器的端口如图所示,图中红色箭头所指向的端口为
【多选题】下列语句和典故体现“自强不息”的民族精神的是
【单选题】关于改革在社会发展中的作用,描述不正确的是?
【单选题】Which of the following is a reasonable way to explain the ability of enhancers to act at a distance?
A.
The activator binds to an enhancer, changing the supercoiling state of the DNA and opening up the promoter to general transcription factors.
B.
The activator binds to an enhancer, slides along the DNA until it encounters the promoter, and activates transcription.
C.
An activator binds to an enhancer, creating loops in the DNA, which leads to the interaction of proteins at the promoter and activation of transcription.
D.
An activator binds to an enhancer and a downstream segment to form a loop, which causes the protein to track toward the promoter and activate transcription.
E.
All of the choices explanations are possible.
【单选题】一般情况下,________是相对规范和不变的,它包含整个技术动作的完整功能和属性。
【判断题】增值税的出口货物税率为零的规定,意味着增值税按该货物征税率计算出口退税()