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【单选题】
Two slants with the same height, mass and different obliquity are located on a smooth surface of a plane. The slant is also smooth. Two same objects slide down on the slant form the top and from the rest, the we have ()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.
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【简答题】从应对的指向性看,应对策略可为____、____ 。
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A.
右眼镜圈鼻侧内缘到左眼镜圈鼻侧外缘
B.
右眼镜圈鼻侧内缘到左眼镜圈鼻侧外缘
C.
左眼镜圈鼻侧内缘到右眼镜圈鼻侧内缘
D.
左眼镜圈鼻侧内缘到右眼镜圈颞侧内缘
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A.
支持疗法
B.
厌恶疗法
C.
领悟疗法
D.
系统脱敏