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单项选择题

调节进出肺小叶的气流量的管道是
A、叶支气管和段支气管
B、段支气管和小支气管
C、小支气管和细支气管
D、细支气管和终末细支气管

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单项选择题
Cats are creatures of habit．They like to go to sleep about the same time every day and for a certain length of time．They seem to have a natural clock inside them that tells them when to sleep．
Cats increase their regular sleep with occasional cat naps (打盹)．Some experts feel that humans could also benefit from this habit．Cat naps help to build up energy in the body．They are also a good way to get rid of trouble! Since cats have the same moods(情绪) as humans, some experts believe that people can improve their moods．People might become happier．
A number of famous people have copied cats by taking cat naps during the day．The naps would usually last from 15 to 30 minutes．
Winston Churchill took cat naps．So did Presidents Harry Truman, John F．Kennedy and Lyndon B．Johnson．These famous men were known for their energy．They were also able to work long hours, often into the night．Napping was their secret．
Perhaps more people learn from cats and take naps to feel better and live longer!
This selection was probably written to_______．
A.showhowlazycatsare
B.talkaboutthehabitsofcats
C.tellaboutfamouspeopleandtheirhabits
D.persuadepeopletotakenaps
单项选择题
纪念性建筑和特别重要的建筑结构的设计使用年限为（　　）。
A.30年
B.50年
C.70年
D.100年
单项选择题
当我们引进国外的技术和设备时没必要附上设计任务书的附件。 A. 对 B. 错
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