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【简答题】
已知模拟信号抽样值的概率密度 如题图所示,量化器是四电平的均匀量化器。求输入信号与量化噪声功率比SNR。
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反馈参考答案：
举一反三
【单选题】You are attempting to parallel two AC generators, and the synchroscope(同步器) pointer is revolving in the fast direction. This indicates that the frequency of the incoming machine is ______.
A.
higher than the bus frequency
B.
lower than the bus frequency
C.
the same as the bus frequency but out of phase with it
D.
the same as the bus frequency and the circuit breaker may be closed at any pointer position
【单选题】You should FIRST treat a fracture by ().
A.
Attempting to set the fracture
B.
Pring further movement of the bone
C.
Applying a tourniquet
D.
Alternately applying hot and cold compresses
【单选题】患者女,70岁。患慢性肺源性心脏病5年。现出现下肢水肿,喘息严重并呈端坐呼吸。为警惕患者发生肺性脑病,护理人员应注意观察
A.
体温
B.
意识状态
C.
饮食情况
D.
皮肤、黏膜
E.
姿势和步态
【简答题】婴儿出生第三天,进行沐浴,用艾熬水,给小孩洗澡,叫做____。
【单选题】马某，因腿部烧伤，急诊入院，医嘱破伤风抗毒素注射。破伤风抗毒素试验液浓度应配制为
A.
15IU/ml
B.
50IU/ml
C.
100IU/ml
D.
150IU/ml
E.
500IU/ml
【单选题】You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow direction. This indicates that the frequency of the incoming machine is
A.
higher than the bus frequency
B.
lower than the bus frequency
C.
file same as file bus frequency but out of phase with it
D.
the same as the bus frequency, and the circuit breaker may be closed at nay pointer position
【简答题】—You need to start exercising again, I guess. —Well, I have been attempting ________ (eat) less recently. But as you know, my mother is such a good cook.
【单选题】You are attempting to parallel two AC generators, and the syncope pointer is revolving in the fast directionThis indicates that the frequency of the incoming machine is _____.
A.
higher than the bus frequency
B.
lower than the bus frequency
C.
the same as the bus frequency but out of phase with it
D.
the same as the bus frequency and the circuit breaker may be closed at any pointer position
【单选题】Do you consider _______any good attempting many scientific experiments?
A.
there
B.
it
C.
this
D.
that
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