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【单选题】
电路如图所示，双电源供电的共射电路，已知【图片】，【图片】，电容对信号视为短路。求放大器的输入电阻 ，输出电阻 ，源电压增益 。【图片】A.
5.6k，10k，-163
B.
2.8k，10k，-163
C.
5.6k，10k，-178
D.
5.6k，5k，-163
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【判断题】College students should take more classes that they are curious about or interested in.
A.
正确
B.
错误
【简答题】制作一个用户登录程序,包括: ( 1 ) User :一个 JavaBean 用于封装用户信息(用户名,密码) ( 1 )页面 1 :包含用户登录表单。 ( 2 )页面 2 :验证用户登录(用户名为 admin ,密码为 12345 ),通过则创建一个 User 对象并使用用户输入设置其属性值,并跳转到页面3;不通过则跳转到页面1,并显示出错信息(要显示是“用户不存在”还是“密码错误”)。 ( 3...
【单选题】Undocumented workers became the target of 'Operation Safe Travel' because ______.
A.
evidence was found that they were potential terrorists
B.
most of them worked at airports under threat of terrorist attacks
C.
terrorists might take advantage of their illegal status
D.
they were reportedly helping hide terrorists around the airport
【简答题】请列举三种计算全系应用的实例________。
【单选题】How did the immigrants in Salt Lake City feel about 'Operation Safe Travel'?
A.
Guilty.
B.
Offended.
C.
Disappointed.
D.
Discouraged.
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