Pneumonia is closely related to ______.A．the decline in ceils of the spinal chordB．the slo
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Pneumonia is closely related to ______.
A．the decline in ceils of the spinal chord
B．the slower rote of reaction
C．the decline in the immune system
D．the loss of cells in kidneys
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正确答案：C
解析：第二段谈到More subtle are such declines as those in the processes involved with be ing immune to disease，Pneumonia被用来作为例证，选项C正确。