阅读下面的短文，文章中有5处空白，文章后有6组文字。请根据文章的内容选择5组文字，将其分别放回文章原有位置，以恢复文章原貌。 Explanation What does a scientist
do when he or she "explains" something Scientific explanation comes in two
forms: generalization and reduction. (46) . They explain
particular instances of behavior as examples of general laws (47)
. Presumably, the person was frightened ’earlier in life by a dog. An
unpleasant stimulus was paired with the sight of the animal (perhaps the person
was knocked down by an exuberant dog) and the subsequent sight of dogs evokes
the earlier response—fear. Most physiologists deal with
reduction. Phenomena are explained in terms of simpler phenomena. For example,
the movement of a muscle is explained in terms of changes in the membrane of
muscle cells, entry of particular chemicals, and interactions between protein
molecules within these cell. (48) . The task
of physiological psychology is to "explain" behavior in physiological terms.
(49) . Thus, the laws of behavior can be reduced to
descriptions of physiological processes. How does one study the
physiology of behavior Physiological psychologists cannot simply be
reductionists. It is not enough to observe behaviors and correlate them with
physiological events that occur at the same time. Identical behaviors, under
different conditions, may occur for different reasons, and thus be initiated by
different physiological mechanisms: (50) .
A. For instance most psychologists would explain a pathologically strong fear of
dogs as an example of classical conditioning. B. A molecular
biologist would "explain" these events in terms of forces that bind various
molecules together and cause various parts of these molecules to be attracted to
one another. C. Most psychologists deal with
generalization. D. How scientists differ in their approaches to
explaining natural phenomena. E. This means that we must
understand "psychologically" why a particular behaviour occurs before we can
understand what physiological events made it occur. F. Like
other scientists, physiological psychologists believe that all natural
phenomena—including human behavior—are subject to the laws of physics.