【单选题】According to the passage, scientists are skeptical toward their equations because scientists ______.
A.
work to explain real, rather than theoretical or simplified situations
B.
know that well-defined problems are often the most difficult to solve
C.
are unable to express their data in terms of multiple variables
D.
are unwilling to relax the axioms they have developed
【简答题】The ( ) theory of language learning was initiated by behavioural psychologist Skinner.
【单选题】What have past behavioural studies found about our brain?
A.
It grows sophisticated with practice.
B.
Its capacity actually knows no limits.
C.
New information learned pushes old information out
D.
It keeps our most precious memories until life’s end.
【简答题】Behavioural processes
【多选题】往复活塞式压缩机主要结构参数包括( ) 等。
【判断题】季节性失业是指在生产过程中由于劳动就业市场供求信息的不完全和不对称而造成的短期、局部性失业。
【多选题】In behavioural segmentation,buyers are divided into groups based on ().
C.
Responses to a pruduct