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【简答题】
A lot of what we throw ______ is made from raw materials which are not renewable.
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【单选题】Which electrons are used to create images where contrast is proportional to average atomic number?
A.
Absorbed electrons
B.
Backscattered electrons
C.
Secondary electrons
D.
Surface electrons
【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。
【简答题】剧烈的,强烈的a.
【简答题】It is not scientific for a normally inactive person to start a program of ( 剧烈的;强烈的 ) exercise suddenly.
【单选题】Suppose that, in each trial, either electrons or protons had been added to each sphere to produce its charge. In Trial 3, which of the 2 types of particles would have been added to Sphere X, and which...
A.
electrons;protons
B.
protons;electrons
C.
electrons;electrons
D.
protons;protons
【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】a. 剧烈的,强烈的
【简答题】The required number of electrons in noble gases’ outer shell is
【简答题】a. 强烈的,剧烈的
【简答题】强烈的, 剧烈的,认真的,热情的 a.
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