题干

中共十一届三中全会以后,农村和城市经济体制改革的共同点是(    )

①改变高度集中的计划经济管理体制

②克服分配上的平均主义

③极大地解放了生产力

④关键是改变了所有制形式

A:①②③④

B:①②③

C:②③④

D:①②④

上一题 下一题 0.0难度 选择题 更新时间:2019-10-17 08:15:22

答案(点此获取答案解析)

B

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    Many people believe that language belongs to human beings. However, cats have developed a language not for each other, but for the human beings who have them as pets.

    When communicating with each other, cats “talk” with a system of signals. Their tails, rather than any kind of “speech”, act as an important way to express themselves. They also touch each other to express s their feelings. With other cats, they will use their voices only to express pain. Unbelievable, all of that changes when a human walks into the room. Cats use many different kinds of vocal (声音的) expressions when they communicate with a person. Since these vocal expressions are not used to communicate with other cats, it seems that cats developed this “language” to communicate with their human owners.

    This fact is shown more clearly when watching rooms that have only one cat and those with several cats. An only cat is usually very vocal, since the only creature(动物)around with whom the cat can communicate is its owner. Cats with other cats, though, are much quieter. If they want to have a conversation, they only need go to other cats and communicate in their natural way.

    Since cats learned to meow(喵喵叫)for the only purpose of communicating with human owners should take the time to learn what their different meows mean. If an owner knows, to name just a few examples, which meow means the cat is hungry, which means the cat wants to be petted, and which means the cat wants to have a little “conversation”, the relationship between cat and owner will be closer.