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【单选题】
下列关于非线性系统说法正确的是( )A.
系统的动态方程用线性微分方程或差分方程来描述
B.
放大器的饱和特性为非线性特性
C.
方程中不含有变量及其导数的高次幂或乘积项
D.
满足叠加原理
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【单选题】室间隔缺损分流量较大时，在心尖区闻及舒张中期隆隆样杂音是
A.
肺动脉瓣关闭不全
B.
主动脉瓣关闭不全
C.
三尖瓣相对狭窄
D.
二尖瓣相对狭窄
E.
三尖瓣相对关闭不全
【单选题】某公司下属 3 个部门实际销售额分别为 10 万元、 20 万元、 17 万元,其超额完成计划的程度分别为 2% 、 1% 、 5% ,则该公司平均完成销售额计划( )
A.
102.67%
B.
104.17%
C.
103.33%
D.
102.63%
【单选题】某公司下属3个部门实际销售额分别为10万元、20万元、17万元,其 额完成计划的程度分别为2%、1%、5%,则该公司平均完成销售额计划()
A.
1.0267
B.
1.0417
C.
1.0333
D.
1.0263
【简答题】用于调整段落中除第1行外的所有文本距左页边距的距离。
【简答题】Have you ever heard of a famous charity called Operation Smile? We hope we can help you understand how we are trying to help children all over the world. Operation Smile was started by a doctor and hi...
【单选题】—Have you brought _______ with you? We won' have time to come back. —Don' worry. All the things we need are here, in this big bag. [ ]
A.
something
B.
anything
C.
nothing
D.
everything
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