A man was worried his wife wasn't hearing as well as she used to and he thought she might need some hearing aid (助听). Not quite sure how to1her, he called the family doctor to discuss the problem. The doctor told him there was a simple test the husband could do to give the doctor a better2of her hearing loss.

    "Here's what you do," said the doctor. "Stand about 40 feet away from her, and in a3conversational speaking tone (音调) see if she hears you. If not, go to 30 feet, then 20 feet, and so on4you get a reply."

    That evening, the wife was in the5, and he was in the yard. He said to himself, "I'm about 40 feet away, and let me see what will happen." Then in a usual tone he asked,"Honey, what's for dinner?"

    No6.

    So the husband moved closer to the kitchen, about 30 feet from his wife and asked,"Honey, what's for dinner?"

    7no reply.

    Next he moved into the dining room where he was about 20 feet from his wife and8, "Honey, what's for dinner?"

    Again he got no reply. He walked up to the kitchen door, about 10 feet away. "Honey,what's for dinner?" Again there was no reply.

    So he9right up behind her. "Honey, what's for dinner?"

    "Chicken! David, for the10time I've said that."

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                                                                                                   《骂鸭》
       邑西白家庄居民某，盗邻鸭烹之。至夜，觉肤痒。天明视之，茸生鸭毛，触之则痛。大惧，无术可医。夜梦一人告之曰：“汝病乃天罚。须得失者骂，毛乃可落。”而邻翁素雅量^①，生平失物，未尝征于声色。某诡告翁曰：“鸭乃某甲所盗彼甚畏骂焉骂之亦可警将来。”翁笑曰：“谁有闲气骂恶人！”卒不骂。某益窘^②，因实告邻翁。翁乃骂，其病良^③已。
       异史氏^④曰：“甚矣，攘^⑤者之可惧也：一攘而鸭毛生！甚矣，骂者之宜戒也：一骂而盗罪减！然为善有术，彼邻翁者，是以骂行其慈者也。”（选自蒲松龄《聊斋志异》）
      注释 ①雅量：宽宏大量，不斤斤计较。②窘：尴尬。③良：真的。④异史氏：指蒲松龄。⑤攘：(rǎng)偷，窃取。

测量降水量的工具是____，表示降水量大小的单位是____。