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【多选题】
关于减七和弦描述,正确的是A.
根音与三音是度
B.
根音与三音是大三度
C.
三音与五音是大三度
D.
根音与七音是减七度
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举一反三
【简答题】人体测量的数据常以百分位数来表示人体尺寸等级，最常用的是以（）、（）、（）三种百分位数来表示。
【单选题】Two slants with the same height, mass and different obliquity are located on a smooth suce of a plane. The slant is also smooth. Two same objects slide down on the slant form the top and from the r...
A.
The momenta of two objects are equal at the bottom end of the slant.
B.
The kinetic energies of two objects are equal at the bottom end of the slant.
C.
For the system composed of the objects and the slant ( and the Earth) ,mechanical energy is not conservative.
D.
For the system composed of the objects and the slant, the horizontal momentum is conservative.
【简答题】It is a smooth thick substance that is put on sore skin or a wound to help it heal.
【简答题】Consider the ocean suce is a smooth plane between sea water (density 1000 kg/m3, sound speed 1500 m/s) and air (density 1.03 kg/m3, sound speed 330 m/s), assume underwater sound is normally incide...
【简答题】If is a point of inflexion of the graph of a smooth function, .
【单选题】_______ is a smooth round opening for nerves and blood vessels.
A.
sinus
B.
foramen
C.
fossa
D.
fissure
【单选题】Two slants with the same height, mass and different obliquity are located on a smooth suce of a plane. The slant is also smooth. Two same objects slide down on the slant from the top and from the r...
A.
（A）The momenta of tow objects are equal at the bottom end of the slant.
B.
（B）The kinetic energy of two objects are equal at the bottom end of the slant.
C.
（C）For the system composed of the objects and the slant (and Earth ), mechanical energy is not conservative.
D.
（D）For the system composed of the objects and the slant , the momentum is conservative.
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