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【判断题】
荷载设计值等于荷载的标准值乘以荷载分项系数。A.
正确
B.
错误
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皮皮学刷刷变学霸
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
【单选题】According to the passage, an overly active child ______.
A.
is not depressed
B.
rejects depressed people
C.
is likely to be depressed
D.
may be depressed
【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.
【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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