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【判断题】
奈奎斯特图描述的是连续时间的线性非时变系统,将其频率响应的增益及相位以极坐标的方式绘出,控制系统或信号处理中使用,用来判断一个系统是否稳定 。A.
正确
B.
错误
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【单选题】听力原文：It is already known that incorrect usage of combination lap and shoulder seat belts can lead to injuries of the spine, neck and pelvis. Now, evidence from three case reports suggests that individ...
A.
正确
B.
错误
【简答题】原文:听音频填空。译文:Neurologist Dr. Daniel Barone says that daily mindfulness meditation is the key to a good night's ______.
He says that incorporating 15 minutes of meditation into your _______ routine is a...
【单选题】听力原文：W: My English teacher suggests that I come in and borrow a Chinese-English dictionary. M: Of course, Miss. You are welcome to use our dictionaries. But they may not be taken out of the library. W...
A.
Buy a dictionary for herself.
B.
Use her dictionary more often.
C.
Take the dictionary out of the library.
【单选题】听力原文： A new study suggests that very young children who watch a lot of television may have attention problems later in school. Children with attention problems cannot sit still or control their action...
A.
Attention problems.
B.
Participating problems.
C.
Communication problems.
D.
Speaking problems.
【单选题】听力原文： Today, we'll look at another problem that is troubling the British society. It seems that young people in Britain today are losing the ability to communicate clearly and accurately in standard E...
A.
Reading and writing in English.
B.
Talking freely in public.
C.
Smoothly and clearly expressing themselves in English.
D.
Successfully handling job interviews.
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