adroit
发表于 2025-3-28 16:56:41
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畏缩
发表于 2025-3-28 18:55:11
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禁令
发表于 2025-3-29 00:16:37
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格言
发表于 2025-3-29 03:21:28
Machineslarge one, for example when a screwdriver is used to ‘lever’ a lid off a tin. Sometimes a small movement is amplified into a large one, as in a bicycle when a small pedal movement results in a much larger movement of the bicycle along a road.
浪费物质
发表于 2025-3-29 09:12:45
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遭遇
发表于 2025-3-29 12:48:41
Change of State tripod and heated very gently with a bunsen burner it will be found that the temperature remains at 0°C until all the ice has melted. The temperature of the water then begins to rise and goes on rising until it reaches 100°C. Heat energy is still being supplied to the beaker from the bunsen burner
不透气
发表于 2025-3-29 18:04:54
Reflections and Shadowsh a narrow slit in front of it, the light is easily seen where it falls on a surface, for example a sheet of paper (Fig. 14.1). The bright line across the paper from the slit marks the path of the ray, which is a straight line.
Permanent
发表于 2025-3-29 22:32:56
Thin Lenses and Curved Mirrorsrge just as if they had suffered a single refraction at a plane somewhere inside the glass. For the purposes of ray constructions we represent a thin lens by a single line (AB in Fig. 16.1), where the refraction is considered to take place.
缓解
发表于 2025-3-30 02:57:29
Vectorsdy in opposite directions? Two forces, one of 5 N one way and the other of 3 N the other way are equivalent to one single force of 2 N in the first direction. The single force to which the other two added together are equivalent is termed the resultant force.
constitute
发表于 2025-3-30 04:58:02
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