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
Scorpions injected with prostaglandins move to hot areas to ______.
A．engage in greater activity
B．seek out a more-iron environment
C．demonstrate that they are ill
D．develop a fever and flight bacterial infections
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