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【单选题】
对于S444站型的基站,半速率时可供()用户同时通话。A.
90
B.
180
C.
360
D.
540
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举一反三
【单选题】___idea of ___sounds much better than Clare's.
A.
The,hers
B.
That, her
C.
That, her's
D.
One, her
【简答题】Many scientists __________their own eyes and ears than the theories of the ancients. A．would rather to believe B. would rather believe C. rather would believe D. will rather believe
【简答题】Susan is thinking of going abroad. That idea of hers/his sounds nice.
【简答题】根据检验统计量的不同,常见的四种假设检验方法为______,_______,_______和_______.
【单选题】With the populationexplosion，scientists will have to_______new methods ofincreasing the world’S food supply．
A.
come up with
B.
carry out
C.
1cad to
D.
stick to
【单选题】The idea of fighting a noise by making more noise sounds strange, but that's exactly what motor engineers are doing in Germany and some other countries. Car makers' research and development laboratori...
A.
By producing pressure waves going in the opposite direction.
B.
By mixing high frequency sound waves with low frequency sound waves.
C.
By mixing new sound waves with the noise and sending them out together.
D.
By making copies of the unwanted sound waves and letting them out a little later.
【单选题】Scientists in the 1950s proclaimed the robot the brainwave (灵感，灵机) of the future—it would free housewives of drudgery (单调沉闷的工作) and fill factories with tireless work force. But in many ways, the brain...
A.
Robots still have a long way to go.
B.
What can robots do today.
C.
How to improve the abilities of robots.
D.
Difficulties in creating a competent robot.
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