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【单选题】
某线性滤波电路,其频率特性函数如下图, 输入 u i =2sin(6t+3 π/10 ), 则其输出uo表达式()。A.
u o =2sin(6t+3 π/10 )
B.
u o =2sin(6t-3 π/10 )
C.
u o =sin(6t-3 π/10 )
D.
u o =sin(6t+3 π/10 )
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举一反三
【简答题】传染病流行必需的3个环节是：() 、 () 、 () 。
【单选题】Which of the following is not the objective of the introduction of a speech?
A.
Get the attention and interest of the audience.
B.
Show off the speaker’s good spoken language.
C.
Establish the speaker's credibility.
D.
Preview the body of the speech.
【单选题】Which of the following is not the objective of career development?
A.
To meet the immediate and future resource needs of the organization on a timely basis
B.
To better inform the organization and the individual about the potential career paths within the organization
C.
To give a welcome for those new employees and reduce their anxiety
【简答题】The objective is not to eliminate conflict but to learn how to manage it to control the ____________ elements while enjoying the productive aspects.
【单选题】传染病流行必需的3个环节是
A.
病原体、人体和其所处的环境
B.
病原体、自然因素、社会因素
C.
病原体毒力、数量及适当的入侵门户
D.
病原体、传播途径、易感人群
E.
传染源、传播途径、人群易感性
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