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问题 单项选择题

轨道板铺设的固定圆锥体的锚杆钻孔孔径为20mm，钻孔深度在直线上（超高≤45mm）为（），在超高的线路上（超高＞45mm）为（）。

A、15cm，20cm

B、10cm，15cm

C、20cm，25cm

答案

参考答案：A

单项选择题

国际运输方式有：海运、陆运、空运和（）。

A.汽车运输

B.人工搬运

C.多式联运

D.船运
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单项选择题

Do animals have a culture What do we mean by "culture" Lately social scientists have begun to ask if culture is found just in humans, or if some animals have a culture too. When we speak of culture, we mean a way of life a group of people have in common. Culture includes the beliefs and attitudes we learn. It is the patterns of behavior that help people to live together. It is also the patterns of behavior that make one group of people different from another group.
Our culture lets us make up for having lost out strength, claws, long teeth, and other defenses. Instead we use tools, cooperate with one another, and communicate with language. But these aspects of human behavior, or "culture," can also be found in the lives of certain animals. Animals can make tools, for example. We used to think that the ability to use tools was the dividing line between human beings and other animals. Lately, however, we have found that this is not the case. Chimpanzees(黑猩猩) can not only use tools but actually make tools themselves. Animals can also share knowledge with each other and use their own language to communicate. So it may be important for us to know that the line dividing us from animals is not as clear as we used to think.

Which of the following statement is TRUE

A．The ability to use language separates human beings.

B．We can be certain that animals have a culture too.

C．Social scientists doubt if animals have a culture too.

D．Some traditional ideas about the difference between human beings and animals may be wron
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