红河学院20082009学年秋季学期《专业英语》B卷.docVIP

红河学院2008-2009学年秋季学期 《专业英语》 课程期末考试试卷 B卷 考试单位：工学院 考试日期： 年 月 日 题 号 一 二 三 四 五 总分 得 分 得 分 评卷人 一、填空题(每空 2 分，共 12 分) 1、The performance of a system normally covers 、 and etc. 2、When synchros are used as position indicators they become detecting devices. 3、Electrical is the easiest electrical property over a wide range at moderate cost. 4、The absolute error means how big is the between the PV and SP. 得 分 评卷人 二、选择题(每小题 2 分，共 20 分) 1、Generally, the external signals to and from a control system include inputs, outputs and . A responses B control signals C system model D performance specifications 2、The results of system analyses are compared to the that are desired of the system. A input signal B accuracy C system model D performance specifications 3、It is customary in the analysis of control systems to employ . A new values B old values C incremental values D decrement values 4、A good amplifier generally requires input impedance and output impedance. A larger/even larger B small/even smaller C larger/smaller D smaller/larger 5、For parallel connection , the overall transfer function is simply the of individual transfer functions. A sum B difference C product D ratio 6、A summer is a device whose output is the of two or more signals. A product B connection C difference D sum 7、The Laplace transform of the is A/s. A step input B ramp input C parabolic input D time function 8、Many practical amplifiers chain together a series of analog amplifier to obtain a high overall voltage gain. A parallels B stages C larges D power 9、The sum of e