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【简答题】
写出Ag + 的电子分布式_____________。
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举一反三
【单选题】At very low temperatures, superconductivity in a metal occurs where______.
A.
electrons do not move freely through the metal
B.
electrons are crowded together
C.
paired electrons move uninterruptedly
D.
paired electron dance together to and fro
【简答题】川贝母的功效是
【多选题】原油储罐(金属罐)发生沸溢和喷溅的典型征兆是( )。
A.
罐壁会剧烈抖动，伴有强烈的噪声(液体剧烈沸腾和金属罐壁变形所引起的)。
B.
烟雾增多。
C.
火焰更加明亮，火舌尺寸变大，形似火箭。
D.
油罐火灾一旦出现沸溢和喷溅的先兆，消防人员和器材必须撤到安全地带，以防造成更大损伤。
【多选题】What is the source of the high-energy electrons used for ATP production?
A.
The source of the high-energy electrons that power the proton pumping differs widely between different organisms and different processes.
B.
During cell respiration—the energy-generating process that takes place in both mitochondria and aerobic bacteria—these electrons are ultimately derived from sugars or fats.
C.
In photosynthesis, the high-energy electrons come from the organic green pigment chlorophyll, which captures energy from sunlight.
D.
And many single-celled organisms (archaea and bacteria) use inorganic substances such as hydrogen, iron, and sulfur as the source of the high-energy electrons that they need to make ATP.
【简答题】The electrons that participate in chemical bonds are the valence electrons, which are the electrons found in an atom's outermost shell.
【简答题】The required number of electrons in noble gases’ outer shell is
【单选题】The______ employed in this book is overly flamboyant,______ the scientific proof intended to corroborate it.
A.
structure...exaggerating
B.
organization ... simplifying
C.
rhetoric... inflating
D.
hypothesis... outdistancing
E.
explanation ... galvanizing
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