2022版《压强》课件 (市优)人教版物理八下课件 (12).ppt
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- 2021-09-26 发布|
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- 46页
;Module 8 Unit 2
His birthday present is
a cinema ticket.;Food ;Clothes;Books;a concert ticket;a CD;I will choose … for my father,
because he likes … .;Q1: Who often goes to the cinema?
Q2: Who likes football?;;;Ask some questions about this passage.;People ;People ;Make a survey about your friends’ habits, and choose birthday presents for them. Then write a short passage to report your survey.;; ;;h;省力杠杆;F2;F2;费力杠杆;;小结;在以下工具中省力的是哪一组〔 〕
A. 铡刀、汽车上的刹车闸、羊角锤起钉子;
B. 镊子、钓鱼杆、剪子;
C. 铡刀、天平、钓鱼杆;
D. 镊子、汽车上的刹车闸、钓鱼杆。;练习二;图中的等臂杠杆处于水平位置并静止,B端绳子的拉力F与A端重力G相比〔 〕
A. F=G;
B. F〈 G;
C. F 〉G;
D. 无法比较。;图中的等臂杠杆处于水平位置并静止,B端绳子的拉力F与A端重力G相比〔 〕
A. F=G;
B. F〈 G;
C. F 〉G;
D. 无法比较。;小资料;小资料;小资料;小资料;小资料;o;o;●;●;o;o;F2;●;●;;●; 返回