Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文: In 1871 the first passenger elevators were used in office buildings and allowed architects to build higher than people could comfortably walk. Another improvement was in building technique. In 1885 the steel skeleton was introduced and allowed for the construction of tall buildings that could withstand high winds. We take for granted some of the other inventions that enabled people to live and work in skyscrapers. For example, few people realized that the telephone was necessary for vertical communication and that flush toilet and vacuum incinerator (a machine designed to burn things in order to destroy them) made waste disposal possible. Now as we entered the age of super skyscraper, some with more than 200 floors, we see the need for even more technological improvements. In the area of heating and cooling systems for example. For all their benefits, these super tall buildings do cause problems though. For one thing they place enormous strain on parking and traffic row in urban areas. But let's leave behind these technical concerns and move on to consider some of the design elements that have come to characterize the age of the skyscraper.
(27)
A.The skyscraper's effect on urban areas.
B.Safety regulations for skyscraper design.
C.The development of the modern skyscraper.
D.Problems with future skyscraper construction.
第1题
与常规CT扫描相比,螺旋CT扫描的最大优点是
A、扫描速度快
B、连续旋转
C、X线管容量大
D、容积扫描
E、存储容量大
第2题
与常规CT比较,螺旋CT扫描的最大优点为
A.连续旋转
B.扫描速度快
C.X线管容量大
D.为容积扫描
E.存储容量大
第4题
与常规CT扫描相比,螺旋CT扫描的最大优点是()
A.扫描速度快
B.连续旋转
C.X线管容量大
D.为容积扫描
E.存储容量大
第6题
螺旋CT与常规断层扫描相比,最明显的两大优势是()。
A、扫描速度快及容积扫描
B、扫描速度快及图像后处理
C、计算机系统的改变及容积扫描
D、探测器的改进及扫描速度快
E、容积扫描及图像后处理
第8题
螺旋CT扫描与传统CT扫描相比最重要的优势是 ()
A.扫描速度快
B.取样速度快
C.重建速度快
D.容积扫描
E.单层连续扫描
第9题
螺旋CT扫描与传统CT扫描相比最重要的优势是
A.扫描速度快
B.二维或三维成像效果好
C.重建速度快
D.容积扫描
E.单层或多层连续扫描
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!