The river is the kind in ____ a boy can bathe.
A.that
B.which
C.where
D.there
A.that
B.which
C.where
D.there
第1题
将英语短文译为中文
2. Kin Recognition (10分)
Many organisms, from sea squirts to primates, can identify their relatives. Understanding how and why they do so has prompted new thinking about the evolution of social behavior. by David W. Pfennig and Paul W. Sherman Kinship is a basic organizing principle of all societies. Humans possess elaborate means by which to identify relatives, such as using surnames and maintaining detailed genealogies.
Mechanisms for distinguishing kin also occur throughout the plant and animal kingdoms regardless of an organism’s social or mental complexity, in creatures as diverse as wildflowers and wasps. Scientists are beginning to discover that an understanding of the origin and mechanisms of kin recognition offers fresh insights into such diverse topics as how living things choose their mates, how they learn and how their immune system works.
BELDING’S GROUND SQUIRRELS live in groups in which mothers, daughters and sisters cooperate extensively. By using odors, the squirrels can distinguish familiar nestmates, who are close kin, from nonnestmates. They can also discriminate between full sisters and half sisters.
第2题
The Yellow River is the second ______river in China.
A.long
B.longer
C.longest
D.most long
第4题
A.错误
B.正确
第7题
A.正确
B.错误
第8题
The Great Pyramid______the west bank of the Nile River, not far from Cairo.
A.is located on
B.is situated in
C.is located at
D.is situated of
第9题
A.invitation
B.challenge
C.request
D.demand
第11题
When he was a boy, Mark Twain dreamed of traveling on river boats to______
A.become a riverboat pilot
B.gather material for his books
C.make money
D.enjoy himself