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【单选题】
关于DAU说法正确的是？A.
每个DAU都有两个通道。
B.
每个DAU只有一个通道。
C.
如果一个DAU坏了，可以由另一个好的DAU向两边同时提供信号。
D.
以上都不对。
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【单选题】The author of “From morning suns and evening dews /At first thy little being came; /If nothing once, you nothing lose, /For when you die you are the same; / The space between is but an hour, / The fra...
A.
Anne Bradstreet
B.
Edwards Taylor
C.
Philip Freneau
D.
None of above
【单选题】If the flame from comustion in the cylinder of a two-stroke engine passes the piston into the space between the piston and the stuffing box, the accumulation of flammable mixture would be ignited, thu...
A.
the crankcase explosion
B.
lifting of the cylinder safety valve
C.
a scavenge fire
D.
opening f the manhole
【单选题】If the space between two cities is stretched or compressed, we can measure the change in space using:
A.
equally spaced rocks
B.
a ruler
C.
the speed of light
D.
a high speed train
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