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【简答题】

人类学家将现代人种分为三类,即欧罗巴种(白种),(),尼格罗种(黑种).

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【单选题】Section BDirections: There are 2 passages in this section.Each passage is followed by some questions or unfinished statements.For each of them there are four choices marked A, B, C and D.You should de...

A.
Meanings conveyed by laughter vary with languages.
B.
Laughter serves as a way of interaction with animals.
C.
Laughter helped interaction before humans could speak.
D.
Human laughed at the very beginning as a sign of pleasure.

【单选题】It is a curious phenomenon of nature that only two species practice the art of war -- men and ants, both of which, significantly, maintain complex social organizations. This does not mean that only me...

A.
There are different factors which may lead to war.
B.
War has been rooted in and will develop with human history.
C.
Both men and ants maintain complex social organizations.
D.
Only men and ants have developed and practiced the art of war.