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单选题
After Venus passes the point of greatest elongation east in its orbit，the first position in which the elongation will be zero is（）.
A
superior conjunction
B
inferior conjunction
C
opposition
D
None of the above; the elongation will never be zero
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increaseB
decreaseC
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be greatest at dew point
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conspicuous objectB
steep depression in the surrounding hills that resembles a cupC
domed structure useful for navigationD
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单选题John Preston was tired（）living in east London, in which he had moved after his wife's death.A
toB
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atD
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填空题In the xy-plane, the graph of y = 2x2 + hx - 6 passes through the point (-3, -21), what is the value of h ?____
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单选题Mars will not be visible（）.A
at elongation angles near 180°B
from quadrature to oppositionC
at conjunctionD
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The tablespace cannot be duplicated or restored to any point in time after the duplication. B
The tablespace cannot be duplicated or restored to the point in time before the duplication. C
The entire database cannot be restored after a TSPITR， so a backup is required.D
You cannot bring the tablespace online until its been backed up.E
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is used mostly by towing vesselsB
has a maximum depth of 14 feet (4.3 meters) at MHWC
West Gap has a controlling depth of 24 feetD
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MOUNTC
NOMOUNTD
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单选题Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will（）A
increase engine powerB
increase engine loadC
decrease engine powerD
improve fuel economy
考题
单选题After a cold front passes the barometric pressure usually（）.A
fluctuatesB
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单选题A SEAMARK，I.E. A BUOY，INDICATING THE NORTH，EAST，SOUTH OR WEST FROM A FIXED POINT，E.G. A WRECK is（）.A
Entrance buoyB
New buoyC
Port buoyD
Cardinal buoy
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