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【单选题】
关于系统频域校正,下列观点错误的是( )
A.
一个设计良好的系统,裕度应为45度左右
B.
开环频率特性,在中频段对数幅频特性斜率应为
C.
低频段,系统的开环增益主要由系统动态性能要求决定
D.
利用超前网络进行串联校正,是利用超前网络的超前特性
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参考答案:
举一反三
【多选题】下列应对通货膨胀风险的各项策略中,不正确的有
A.
进行长期投资
B.
签订长期销货合同
C.
取得长期借款
D.
增加企业债权
【判断题】Type I diabetes is generally associated with obesity
A.
正确
B.
错误
【单选题】Obesity (肥胖): the Scourge (祸害) of the Western World Obesity is rapidly becoming a new scourge of the western world, delegates agreed at the llth European Conference on the issue in Vienna Wednesday to...
A.
250,000,000
B.
1,200,000,000
C.
1,450,000,000
D.
950,000,000
【单选题】既是教育评价的基础和重点,也是学校教育评价的核心的是 ( )
A.
学业评价
B.
品德评价
C.
技能评价
D.
学生评价
【单选题】Obesity(肥胖):the scourge(祸害)of the western world Obesity is rapidly becoming a new scourge of the western world,delegates agreed at tile 11th European Conference on the issue in Vienna Wednesday to Sat...
A.
250,000,000
B.
1,200,000,000
C.
1,450,000,000
D.
950,000,000
【单选题】The best title for this text would be
A.
The Relations between Obesity and Malaria.
B.
Obesity Helps Mice Fend Off Malaria.
C.
Obesity Cures Malaria.
D.
Mouse Models Raise Hypotheses.
【单选题】下列属于尾突出体作用的是:1、增强船尾的结构强度;2、保护车叶和舵;3、减少伴流影响;4、改善航行性能
A.
①、②、③、④
B.
②、③、④
C.
①、③、④
D.
①、②、④
【单选题】下列应对通货膨胀风险的各项策略中,不正确的是
A.
进行长期投资
B.
签订长期购货合同
C.
取得长期借款
D.
签订长期销货合同
【单选题】学校教育评价的核心是( )。
A.
学生评价
B.
教师评价
C.
学校管理评价
D.
课程评价
【单选题】In what way is obesity contagious and epidemic?
A.
Social networks let the obesity spread rapidly.
B.
Individuals have genetically determined ranges of weights.
C.
Obesity can easily spread from one to another without any physical contact.
D.
Obesity can spread rapidly and extensively by infection and affecting many individuals in an area or a population at the same time.
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