【单选题】已知 判断该信号是否是周期信号,并确定其周期。
【单选题】passage two 19.
A.
The great number of people engaged in cigarette producing.
B.
The rapid development of cigarette-malting machines.
C.
The rapid development of cigarette-malting factories.
D.
The increasing output of tobacco.
【单选题】Passage Two 19.
A.
Teaching children how to manage their money.
B.
Bargaining with a car dealership.
C.
Arranging doctors' appointments.
【单选题】下列各项中,在我国具有最高法律效力的是( )
【单选题】已知一脉冲信号其周期为1us,经过一个10分频器后,输出脉冲的周期为()。
【单选题】下列各项中,在我国具有最高法律效力的是()
【单选题】Passage Two 第19题
A.
People should take in less fat as they can.
B.
It is the reason for peoples obesity.
C.
It is useless for people's health.
D.
It adds a burden to people's heart.
【单选题】Passage Two Questions 19 to 22 are based onthe passage you have just heard. Question 19
A.
It contains one paragraph of introduction.
B.
It contains four paragraphs of evidence.
C.
It consists of two sides of the argument.
D.
It contains two paragraphs of the conclusion.