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【判断题】
物料算，是指根据物质质量守恒原理对生产过程中使用的原料、生产的产品和产生的废物等进行测算的一种方法。()A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】硝化作用和反硝化作用
【单选题】Advertisements are only read by a small group of people of high social status．
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】Sociologists have long recognized that social tensions are______elements of group life.
A.
average
B.
routine
C.
normal
D.
standard
【单选题】The neuroimaging studies show that shyness is______.
A.
a kind of disability due to differences on the brain
B.
something that only emerges in a child in infancy
C.
something that stays with the person for all his or her life
D.
not a learned behaviour—it is innate
【简答题】比较硝化作用和反硝化作用的区别。
【简答题】Advertisements are only read by a small group of people of high social status.
【简答题】请写出硝化过程和反硝化过程的反应式,并比较硝化作用和反硝化作用的异同。
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