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
By mentioning microbe, the author intends to______.
A. advocate that animals with a nervous system can all learn
B. argue that learning is an adaptation to a changing environment
C. claim that learning has some kind of side effects
D. prove that the adaptation may not include learning with a nervous system
Some species are better learner than others partly because______.
A. some animals prefer to remain dumb
B. some animals don"t have a nervous system
C. learning may endanger some animals" health
D. they are better taught than others
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