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【单选题】
已知某挡土墙高5m,墙背竖直、光滑,填土表面水平,填土为粘性土,容重为17kN/m3,内摩擦角为22°,粘聚6kPa,则主动土压力大小为()kN/mA.
30.22
B.
60.37
C.
38.96
D.
30.54
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举一反三
【单选题】46 he handed the medicine to the next musher, Shannon`s face was black from the extreme cold.
A.
Though
B.
Since
C.
When
D.
If
【单选题】The doctor did a lot to reduce the patient's fear ____ he would die of the disease. [ ]
A.
that
B.
which
C.
of which
D.
of it
【简答题】The maximum data rate of any single wireless link can be described by the shannon’s theorem which is related to the（）in hertz，and the（）on the channel A．signal frequency B．bandwidth C．carrier frequency...
【简答题】We are taking____________lesson. And it is __________Shannon's lesson.
【单选题】For Shannon's Theorem:
A.
It does not consider noise on the channel
B.
It is more accurate more the Nyquist's Therom
C.
it uses signal-to-noise ratio
D.
It can only be applied on copper wires
【简答题】保函的有效期包括______和______。
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