单项选择题

Fevers cause ______.

A．prostaglandins to be formed
B．iron to be made available to bacteria
C．leukocytes to be more mobile
D．lizards to be cold-blooded animals
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单项选择题
The passage implies that ______.
A．the fever process is widespread because moderate fevers have benefits
B．the reduction of fevers can inhibit bacterial growth
C．man can use sun lamp to raise lizards' temperature
D．crayfish injected with bacteria have a purpose for moving to hot areas
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