● 电子图书悄然问世，带来了巨大的市场潜力，并对出版业造成一定的冲击 ● 电子图书的优势和弊端 ● 电子图书与纸质书刊的前景 Is It Farewell to the Printed Book

A．Emotions are accompanied by some certain behaviors.
B．Emotions are combinations of subjective feelings.
C．Extreme emotional reactions are the features of emotional cognitive thought.
D．Emotional occurrences are also the processes of mental thinking.

A．Because they try to place their research on a manageable basis.
B．Because there too many emotions to recognize.
C．Because each emotion represents a different implication.
D．Because there are some secondary emotions.