【判断题】【消耗次数：1】
不同的连续函数，只要它们在各采样点上的值相等，则它们的Z变换也相同。
①
正确
②
错误
参考答案：
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相关题目
【单选题】
质量相等的两质点，若它们在一般位置的受力图相同，则它们的运动情况
①
必然相同；
②
只有在所选坐标形式相同时才会相同；
③
只有在初始条件相同时才会相同；
④
只有在初始条件和所选坐标形式都相同时才会相同。
【单选题】
质量相等的两质点，若它们在一般位置的受力图相同，所选的坐标形式相同，则它们的运动微分方程
①
必然相同；
②
也可能不相同；
③
只有在运动初始条件相同的条件下才会相同；
④
在运动初始条件相同时也可能不相同。
【单选题】
氦气、氮气、水蒸汽（均视为刚性分子理想气体），它们的摩尔数相同，初始状态相同，若使它们在体积不变情况下吸收相等的热量，则（）
①
它们的温度升高相同，压强增加相同
②
它们的温度升高相同，压强增加不相同
③
它们的温度升高不相同，压强增加不相同
④
它们的温度升高不相同，压强增加相同
随机题目
【单选题】
The government enacted new laws to ________________ terrorism(恐怖主义).
①
fight for
②
fight against
③
fight in
④
fight at
【单选题】
Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people keep their anger inside. They can not or will not express it. This is called repressing anger. Many doctors think that repressing anger is more dangerous to a person’s health than expressing it. They say that when a person is angry, the brain gives out the same hormones (荷尔蒙) as that are produced during tense and nervous situations. They speed the heart rate and raise blood pressure, so the person feels excited and ready to act. Repressing these feelings will only make the feelings continue, and this can lead to many medical problems. To prevent these problems, these doctors suggest letting the anger out by expressing it freely. But recently some other doctors question this. They say that people who express anger repeatedly and violently become, in fact, more but not less angry. And this could cause medical problems. However, some doctors say that both repressing and expressing anger can be dangerous. They believe that those who express anger strongly may be more likely to develop heart diseases, and that those who keep their anger inside may face a greater danger of high blood pressure. Doctors say the solution is to learn how to deal with anger. The first step is to admit that you are angry and to recognize the real cause of the anger, and then to decide if the cause is serious enough to get angry about. If it is, do not express your anger while angry. Wait until your anger has cooled down, and express yourself calmly and reasonably. Doctors also say that a good way to deal with anger is to find humor in the situation that has made you angry, for laughter is much healthier than anger.What is the main idea of this passage?
①
Anger should be dealt with in a proper way.
②
Different people deal with anger in different ways.
③
Doctors suggest dealing with anger by repressing it.
④
The best way to deal with anger is to laugh when angry.
【单选题】
It is _____________ that today people in some remote areas know about the rest of the world.
①
difficult
②
amazing
③
inferior
④
superior
【单选题】
They dont____________ the importance of this problem.
①
understands
②
understood
③
understanding
④
understand
【单选题】
The people who ____________ cars work very quickly.
①
astonish
②
assemble
③
afford
④
acquire
【单选题】
Tommy: Mommy, when will we have dinner? I’m starving.Mother: __________ We have to wait for Daddy.
①
OK, honey.
②
Quickly, honey.
③
Soon, honey.
④
All right, honey.
【单选题】
He____________ cold and hunger a great deal.
①
escaped from
②
suffered from
③
kept away from
④
came from
【单选题】
Youdonthavetobeinsuchahurry,Iwouldratheryou________onbusinessfirst.
①
wouldgo
②
willgo
③
went
④
havegone
【单选题】
Now it is illegal (非法的) to kill ______________ for their ivories.
①
tigers
②
lions
③
elephants
④
birds