题目内容
（请给出正确答案）
A.A differs among animal species
B.B to psychological distance
C.C begin toattack
D.D to physiological distance
E.E distance between an animal and its enemy before fleeing
F.F distance between certain animal species before fleeing
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更多“If an animal”critical distance…”相关的问题
A ferret is probably a kind of_______．
A.tame animal
B.fierce anitaal
C.lovely animal
D.tamable animal
Each animal owns ______.
A．sound
B．home
C．language
A.Tourist and animal feeder.
B.Consultant and animal expert.
C.Interviewer and interviewee.
D.Pet owner and animal doctor.
Squeeze out the poisonous blood in case the animal bite mangle the skin.
A．Y
B．N
C．NG
To study animal emotions, scientists should
A．set up improved and refined skillful experiments.
B．analyze human emotional.
C．distinguish what is emotional and what is conditioned.
D．learn from animal behaviorists.
Useful drugs are made from inorganic substances or are plant and animal by-products.
A．materials
B．derivatives
C．chemicals
D．ingredients
The Eskimos always live in a tent made of animal skins surrounded by blocks of ice.
A．Y
B．N
C．NG
