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【单选题】
车床的主轴属于 。A.
心轴
B.
转动轴
C.
传动轴
D.
都不是
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举一反三
【单选题】ATP is the cells ’ major energy-carrying molecule, and in order for a cell to survive, the cell must be able to regenerate ATP when ATP levels drop. Which one of the following statements accurately de...
A.
ATP is more stable than ADP.
B.
ATP has more positively charged phosphate groups than ADP.
C.
Phosphate groups repel each other, which in ATP leads to strained bond formation.
D.
Heat from ATP hydrolysis is used to drive energy requiring processes.
E.
ATP is hydrolyzed directly in the cell.
【单选题】One energy-carrying substance in the cell is named as _____________ .
A.
adenosine triphosphate
B.
alkaloide
C.
phospholipid
D.
chlorophyll
【简答题】幼儿文学除了具有语言艺术一般的美学特征外,还有哪些审美特点。
【单选题】The energy acquired by a particle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referred to as ( ).
A.
a joule.
B.
an electron - volt.
C.
a coulomb.
D.
a proton - volt.
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