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【单选题】
下列各句中加横线的词解释,错误的一项是( )A.
渐霜风凄惨， 冷落，残照当楼。 ( 渐 : 旋、又。 : 泛指江山。 )
B.
是处红 衰 翠 减，苒苒物华休。 ( 是处 : 到处。红 : 红色。翠 : 绿色。 )
C.
望故乡 渺邈 ，收。 ( 渺邈 : 渺茫遥远。 : 渴望回家团聚的心情。 )
D.
争 知我、倚阑干处，正 恁 凝愁。 ( 争 : 怎。恁 : 如此。 )
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【简答题】An instrument to
measure the acceleration of gravity on Mars is constructed of a spring
from which is suspended a mass of 0.24(kg). At a place on earth where the
local acceleration of gravity is 9....
【单选题】The acceleration of a projectile is:
A.
g
B.
-g
C.
0
D.
dependent on its initial velocity
【简答题】在下图所示电路中，分别按下列要求接成所需的两级放大电路。
【简答题】An instrument to measure the acceleration of gravity on Mars is constructed of a spring from which is suspended a mass of 0.24(kg). At a place on earth where the local acceleration of gravity is 9.80(...
【单选题】A rock is thrown off a 35 m cliff at a 45° angle above the horizontal. Which is the following is true regarding the acceleration of the rock?
A.
The acceleration will be of magnitude g and have both horizontal and vertical components.
B.
At the peak of the rock’s path, the magnitude of acceleration will be half of what it was when the rock was initially thrown.
C.
The acceleration will be of magnitude g and in a downward direction.
D.
The acceleration will be downward during the rock’s ascent and upward during the rock’s descent.
E.
The acceleration will increase throughout the rock’s flight .
【单选题】Orbits decay due to ______.
A.
the acceleration of the spacecraft
B.
the crash with small amounts of air molecules
C.
the invention and application of solar sails
D.
the existence of air molecules
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