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【简答题】
已知系统的特征方程为 s 4 +2s 3 +3s 2 +4s+1=0, 试用劳斯判据判断系统的稳定性。
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【单选题】—Have you seen the movie “2012”？It’s quite thrilling. —No，I ________ to buy a ticket，but it ________ cats and dogs.
A.
have intended；was raining
B.
intended；had rained
C.
have intended；rained
D.
had intended；was raining
【单选题】下列关于设计文件编制阶段的说法中哪一种是正确的?()
A.
在可行性研究阶段需编制投资估算
B.
在方案设计阶段需编制预算
C.
在初步设计阶段需编制工程量清单
D.
在施工图设计阶段需编制设计概算
【单选题】关于民间艺术说法错误的是
A.
民间艺术是针对学院派艺术、文人艺术的概念提出来的
B.
民间艺术并不是劳动者创造的艺术
C.
民间艺术包括了民间工艺美术、民间音乐、民间舞蹈和戏曲等多种艺术形式
D.
民间艺术与民俗之间的关系极为密切
【单选题】在Word2010中，关于艺术字说法错误的是（）。
A.
可以为艺术字设置阴影效果
B.
可以为艺术字设置棱台效果
C.
可以为艺术字设置三维旋转效果
D.
不能对艺术字设置垂直方向
【单选题】What function is money serving when you buy a ticket to a movie?______.
A.
store of value
B.
a unit of account
C.
transaction demand
D.
a medium of exchange
【单选题】A steady decline in annual movie-ticket sales is about to begin. More than half of the tickets sold last year were sold to the age group under twenty-five years of age, representing twenty-seven perce...
A.
Medical advances have lowered the mortality rates for those who are forty to sixty years of age.
B.
Many people gradually lose interest in going to the movies after they reach twenty-five years of age.
C.
The number of movie theaters has been increasing, and this trend is expected to continue during the next ten years.
D.
Movie-ticket sales tend to increase as the size of the work force increases, and the size of the work force will increase annually during the next decade.
E.
Experts agree that people under twenty-five years of age will continue to account for more than half of the total number of tickets sold in each of the next ten years.
【多选题】关于设计概算说法正确的是（ ）。
A.
编制从筹建到交付使用全部费用的文件
B.
两阶段设计在技术设计阶段编制设计概算
C.
三阶段设计在施工图设计阶段编制设计概算
D.
三阶段设计在扩大初步设计阶段编制修正概算
E.
三阶段设计在技术设计阶段编制修正概算
【单选题】There is only one ticket for Lucy and Susan. So ______ of them will go to the movie.
A.
either
B.
neither
C.
both
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