What is the main idea of this passage?
A. How humans protect wild birds in Africa.
B. How humans get honey helped by wild birds.
C. How humans help wild birds to get the nest.
D. How humans train wild birds to be responsive.
查看答案
What is a fact about these small wild birds?
A. They often bite bees and then die.
B. They like to eat honey very much.
C. They usually don’t like to eat the bees’ nest.
D. They cooperate with humans to get food from bees.
以自己的生活体验,举例说出至少两个与呼吸系统、消化系统、感觉器官、内分泌系统或体温调节(与其中之一有关即可)相关的生理现象或生理调节过程,并尽可能完整地说出此现象所涉及的主要生理学理论。
肺泡表面活性物质有什么生理功能?当表面活性物质减少时,可能导致什么后果?
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