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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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

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