试述手锤的种类和挥锤的方法？
参考答案：
常用的手锤按其形状有圆头和方头两种。按其大小重量有0.25kg、0.5kg和0.75kg等几种。
挥锤时根据锤击力量的大小不同分为：
（1）手挥：只用手腕上下弯曲的力量，锤击力小。
（2）肘挥：肘和手腕协同用力，上下挥动，距离锤击物的距离增大，锤击力较大。
（3）臂挥：手腕和肘向后弯曲并使上臂稍微扬起，距锤击物的距离比肘挥更大，这种方法锤击力最大。
A certain good woman one day said something that hurt her best friend of many years.She____immediately and would have done anything to have taken the words back.____she said hurt the friend so much that this good woman was herself hurt____the pain she caused.____to cancel what she had done，she went to an older，wiser woman in the village，explained her situation，and asked for____. Listening to her，the older woman___the younger woman’s distress and knew she must help her.She also knew she could never____her pain，but she could teach.She knew the____would depend only on the character of the younger woman.She said，“Tonight，take your best feather pillows and put a single feather on the doorstep of each house in the town____the sun rises.” The young woman hurried____to prepare for her chore，even though the feather pillows were very____to her.All night long，she labored alone in the cold.Finally the sky was getting____，she placed the last feather on the steps of the last house.Just as the sun rose，she returned to____. “Now，” said the wise woman，“Go back and____your pillows with the feather you have put on the steps.Then everything will be____it was before.” “You know that’s____！The wind blew away each feather as fast as I placed them on the____！” The younger woman was surprised. “That’s true，” said the older woman.“Never forget.Each of your____is like a feather in the wind.Once spoken，no amount of effort，____how heartfelt or sincere，they can never return to your mouth.Choose your words well and____them most of all in the presence of those you love.”
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