Which of the following best summarizes the text？
A. Lots of animals learn, but smarter isn"t better.
B. Humans pay hidden costs for learning.
C. Learning has dangerous side effects to animals.
D. Animals learn to adapt to changing environment.
查看答案
The underlined word in Paragraph 6 refers to______.
A. agreement
B. conclusion
C. balance
D. equality
5G NR的信道带宽利用率最高可达()
A98.28%
B90.28%
C92.55%
D97.32%
Flies evolve to be smarter only in the labs fundamentally because______.
A. flies can adapt to the environment without learning
B. the cost of learning in the wild is too huge to bear
C. they may get some diseases as a byproduct in nature
D. the lab conditions allow them to learn better
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