2021年考研真题2021年考研英语真题和答案(2)

takes more upkeep, burns more fuel and is slow 6 the starting line because it depends on learning — a gradual 7 — instead of instinct.Plenty

of other species are able to learn, and one of the things they’ve apparently learned is when to 8 .Is there an adaptive value to 9 intelligence? That’s the question behind this new research.I

like it.Instead

of casting a wistful glance

10 at all the species we’ve left in the dust I.Q.-wise, it implicitly asks what the real

11 of our own intelligence might be.This

is

12 the mind of every animal I’ve ever met.Research

on animal intelligence also makes me wonder what experiments animals would

13 on humans if they had the chance.Every

cat with an owner,

14 , is running a small-scale study in operant conditioning.we

believe that

15 animals ran the labs, they would test us to

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