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 fight bacterial infections
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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
单项选择题
Which of the following best states the main idea of the passage
A．Cold-blooded animals can develop fevers.
B．There are benefits to developing fevers.
C．Fevers inhibit bacterial growth.
D．Lizards can develop fevers.
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