初中英語河北加拿大版學(xué)生用書 30

[by:喜歡tingclass.net，請把tingclass.net告訴你QQ上的5位好友，多謝支持！] [00:00.00]聽力課堂網(wǎng) Lesson 30: [00:03.21]Danny the "Dry-o-saur"! [00:07.58]Danny,Jenny and Brian stand in front of the class.Everyone laughs. [00:15.23]Danny is wearing his swimsuit!"Okay,everyone!"says Jenny. [00:22.67]"We are going to show you an interesting experiment.Danny sits down. [00:30.62]Brian puts water into the jar. [00:35.19]He puts the card-board on top of the jar. [00:40.33]He puts his hand on the cardboard and turns the jar upside down. [00:47.46]Then he holds the jar above Danny's head. [00:52.53]"Next,Brian will take his hand off the cardboard,"says Jenny. [01:00.29]"Now,you know why I'm wearing my swimsuit,"says Danny [01:06.74]"Are you ready,Danny?" [01:09.90]"I guess so.""Danny's theory is that he will now get wet,"says Jenny." [01:19.15]Is he right,class?""Yes,I think so!" says one student. [01:26.31]"No,I don't think so says Brian.Brian takes away his hand.Brian's right! [01:35.09]"Are you surprised,class?"asks Jenny. [01:40.94]"Examine the jar and the cardboard. [01:45.80]We have discovered that cardboard can hold the water in. [01:53.03]What are your conclusions? Why didn't Danny get wet?" [01:59.80]"Maybe you used glue says one student."No,that's not it! [02:08.76]Brian,can you explain?"say Jenny."The air pushes up on the cardboard,"says Brian. [02:19.02]"It's like water pushing up on a boat [02:23.70]The force is strong enough to hold the water. [02:29.55]Air is stronger than I thought!

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