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【单选题】
如图所示电路已达稳态,现增大 R 值,则该电路( )A.
因为发生换路，要产生过渡过程
B.
因为电容 C 的值没有变，所以不产生过渡过程
C.
因为有储能元件且发生换路，要产生过渡过程
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反馈参考答案：
举一反三
【单选题】How can you create a listener class that receives events when the mouse is moved？（）
A.
By extending MouseListener.
B.
By implementing MouseListener.
C.
By extending MouseMotionListener.
D.
By implementing MouseMotionListener.
E.
Either by extending MouseMotionListener or extending MouseListener.
F.
Either by implementing MouseMotion Listener or implementing MouseListener.
【简答题】下列不是脑脊髓液检查之适应证的是
【简答题】已知在web.xml中配置的如下：
cn.itcast.listener.MyListener
则下面说法中，正确的是（）(多选)A. 元素说明在web.xml中配置了一个 B. 是指类所对应的包名及类名 C. 一个 元素中可以出现多个子元素 D. 元素中还可以添加子元素
【单选题】You work as a database administrator for Certkiller .com. When you tried to connect to the database， you received the following error： ERROR： ORA-12541：TNS：no_listener You found that the listener is...
A.
It would attempt to start the default listener
B.
It would start the most recently created listener.
C.
It would display an error with a message asking for the listener name to be specified.
D.
It would show you a list of listeners and prompts for the listener name that you want to start.
【单选题】付款期限为30天,为鼓励客户提前付款,提供10天付款,95折;20天内付款,97折;超过20天付款,无折扣。下面表述方式正确的是:
A.
10/5,20/3,30/N
B.
5/10,3/20,N/30
C.
N/30,3/20,5/10
D.
30/N,20/3,10/5
【单选题】You issue these LSNRCTL commands： LSNRCTL> SET CURRENT_LISTENER listener01 LSNRCTL> START listener02 What is the result of issuing these commands？（）
A.
A listener named LISTENER is started.
B.
A listener named LISTENER01 is started.
C.
A listener named LISTENER02 is started.
D.
The START command fails and no listener is started.
【简答题】动力元件是把原动机输入的机械能转换为油液压力能的能量转换装置。其作用是为液压系统提供( ). 执行元件是将油液的压力能转换为( )的能量转换装置。 动力元件为各种( )。 执行元件各类液压缸和( )。
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