Besides yielding such psychological rewards as relief from stress, deep relaxation, if practiced regularly, can strengthen the immune system and produce a host of other physiological benefits.


deep relaxation, if practiced regularly, can strengthen the immune system

one can strengthen the immune system through deep relaxation, if it is practiced regularly

the immune system can be strengthened as a result of deep relaxation if practiced regularly

when deep relaxation is practiced regularly, the immune system can be strengthened

when practiced regularly, the results of deep relaxation can be to strengthen the immune system

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题目分析：

本题实际上是非常简单的，首先我们需要看出在句首出现的Besides yielding such psychological rewards as relief from stress是伴随状语，其主语为其所修饰句子的主语，而“产生出一些对身体的好处的”应该是“深度放松（deep relaxation）”。基于这一点就可以直接排除掉选项(B)、选项(C)、选项(D)和选项(E)了，答案是选项(A)。

选项分析：

略。

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