最新常见介质粘度表讲课稿
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常见物质的粘度表
粘度，指物质的流动性( 或不流动性)。任何流体都有粘度。液体粘度是它抵抗剪切力的一个尺度，在初始及持续流动时才体现出来。例如，粘度高的液体比粘度低的液体需要更大的动力来流动。流体粘度与温度有关。
粘度测量单位常用的有厘泊cP，泊P等，其换算过程：
1厘泊(1cP)=1毫帕斯卡.秒(1mPa.s)
100厘泊(100cP)=1泊(1P)
1000毫帕斯卡.秒(1000mPa.s)=1帕斯卡.秒(1Pa.s)
水的粘度为 1 厘泊，流动十分容易。可以根据流体的粘度，类比出我们常见的物质。
1 厘泊= 水； 3厘泊= 牛奶； 34厘泊= 植物油； 176厘泊= 番茄酱； 880厘泊= 甘油；1760 厘泊= 糖蜜（Molasses）； 3000厘泊= 胶水； 8640厘泊= 糖浆； 15200 厘泊= 酸奶油
水的粘度为1厘泊，流动十分容易。糖蜜有一粘度为100,000，它是很稠厚的。
1厘泊=水；10,000厘泊=Honeyo；500厘泊=植物油；100,000厘泊=Molasseso；2,500厘泊=马达油
Unit 3 Home life(B)
Part I Listening(30％)
I．Listen and choose the word you hear on the tape．(选出听到的单词)6％
( )1．A．bedroom B．bathroom C．classroom
( )2．A．making B．baking C．riding
( )3．A．peach B．beach C．teach
( )4．A．sand B．sad C．say
( )5．A．summer B．some C．sun
( )6．A．watch B．wash C．want
Ⅱ．Listen and choose the sentence you hear on the tape．(选出听到的句子)6％
( )7．A. I'm making a model plane in the bedroom．
B. I'm making a model plane in the sitting room．
C. I’m making a model plane in the living room．
( )8．A. Mr. Chen and Peter are washing dishes in the kitchen．
B. Mrs. Chen and Peter are washing dishes in the kitchen．
C. Mrs. Chen and Peter are washing hands in the kitchen．
( )9．A. Where’s Paul? He’s playing beach ball over there．
B. Where’s Paul? He’s playing football over there：
C. Where’s Paul? He’s playing basketball over there．
( )10．A. There are many shells in the sand．
B. Are there many shells in the sand?
C. We can’t see any shells in the sand．
( )11．A. He usually does his homework at 7：00 in the evening．
B. He usually does his homework at 7：30 in the evening．
C. He usually does his homework at 8：00 in the evening．
( )12．A. What’s Sally doing? She’s swimming．
B. What’s Sally doing? She’s swinging．
C. What’s Paul doing? He’s swimming．
Ⅲ．Listen and choose the best answer．(听问句，选出最恰当的应答句)6％
( )13．A．He’s sleeping．B．She’s sleeping．C．She doesn’t sleep．( )14．A．Yes，I am．B．Yes，he can．C．Yes, he is．
( )15．A．He’s swimming．B．They’re swimming．C．Yes，they are．
( )16．A．She’s in the kitchen．B．She’s washing dishes．C．She’s reading。
( )17．A．Yes，they are．B．No，they can’t．C．They’re running．
( )18．A．We’re reading．B．We sing．C．I'm singing．
Ⅳ.Listen and fill in the blanks．(听录音，填入所缺单词)6％
19. What a beautiful_______!
20. Is your sister cooking dinner in the________?
21. He is taking a shower in the_________．
22. Tom and Jim are_________their hair now．
23. Look! Your mother is_______dinner．