Animals cannot talk about the things except those about food, danger, enemy, etc. because the communicative signals of animals do not have the property of displacement.
对
举一反三
- You have to be careful when you talk to a Westerner about pigs because（）. A: they worship pigs best of all B: they consider pigs as bad animals C: they aren’t used to talking about pigs D: they don’t like the topic about pigs at all
- Who made specific plans about how to catch and kill animals for food?
- ________ they have written about the behaviors of animals is hardly anything new.
- African safari is about animals in their natural habitat, and lots of animals are easily seen EXCEPT ______.( ) A: polar bears B: leopards C: elephants D: lions
- If those wild animals can’t find enough food, they ______ (die)or have to leave their habitat soon．
内容
- 0
Don’t talk about such things ______ you do not understand.
- 1
Sometimes people do not like to eat a certain kind of food because they do not have any idea about the nutrition of the food.
- 2
A biologist must have a lot of knowledge about the life and ______ (behave) of both plants and animals
- 3
African safari is about animals in their natural habitat, and lots of animals are easily seen but__.
- 4
All of the following statements are true EXCEPT_______. A: Forty percent of cancer is caused by problems related to food. B: Researchers have known about the potential danger of food additives for many years C: We eat some of the food additives directly and some indirectly D: Drugs are always given to animals for medicinal purposes