英语课件unit 4 sharing
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It is said that the past three years witnessed the largest amount of funds raised for Project Hope.The volume accounted for nearly half of the total raised in the last 10 years while the number of Hope schools built made up more than half.
Since last year ， the strategic focus of Project Hope has gradually been shifted from the previous widespread aid to the cultivation of excellent students and follow－up support for Hope schools.
A.粗糙斜面上的金属球M在弹簧的作用下运动，该运动是简谐运
√动B.单摆的摆长为l，摆球的质量为m、位移为x，此时回复－力m为lgxF＝
C.质点A、C之间的距离就是简谐波的一个波长
Unit 4 Sharing
Hale Waihona Puke Baidu
【问题导读】
Read the text and try to tell if these sentences are True(T)or False(F)．
1．Project Hope has brought hope to the children who suffer from serious illness.( F )
Project Hope Project Hope has brought hope to children over the past 10 years ， said a national working conference held in Harbin on Saturday. Project Hope，which was first launched in October 1989，is a nationwide educational project to help mainly school dropouts in outlying，poverty－stricken areas resume their schooling.
√A.甲图表示砂摆摆动的幅度较大，乙图摆动的幅度较小 a B.甲图表示砂摆摆动的周期较大，乙图摆动的周期较小
√C.二人拉木板的速度不同，甲、乙木板的速度关系v甲＝2v乙 D.二人拉木板的速度不同，甲、乙木板的速度关系v乙＝2v甲 b 图2 解析
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3.(改编自人教版选修3－4第12页“问题与练习”第2题)下列四幅 图中关于机械振动和机械波的说法正确的是( )
E.由图象可以求出当地的重力加速度 图1
解析
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2.(改编自人教版选修3－4第13页“演示实验”)甲、乙两位同学
分别使用图2a所示的同一套装置观察单摆做简谐运动时的振动图
象，已知二人实验时所用的单摆的摆长相同，落在木板上的细砂
分别形成的
曲线如图b所示，下面关于两图线的说法中正确的是( )
谢谢观看！
教材素材再回扣 选修 3-4
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1.(改编自人教版选修3－4第10页“问题与练习”第4题)如图1所 示为同一地点的两单摆甲、乙的振动图象，下列说法中正确的
√是( ) A.甲、乙两单摆的摆长相等
√B.甲摆的振幅比乙摆大
C.甲摆的机械能比乙摆大
√D.在t＝0.5 s时有正向最大加速度的是乙摆
2．The main tasks of Project Hope in the future will concentrate on building more Hope schools，strengthen the training of teachers of these schools.( T )
According to the latest statistics，Project Hope raised 1.78 billion yuan(US $ 214 million)by June,1999，which aided 2.209 million education－deprived children to go to school and 7,549 Hope schools to be built.
The main tasks of Project Hope in the future will concentrate on building more Hope schools，strengthening the training of teachers of these schools，equipping the schools with computers and related education software，and developing long－range education.
【日积月累】 1．launch 2．dropout 3．outlying 4．resume 5．deprive 6．cultivation
v．发射；发动，开展 n．退学者 adj.边远的；偏僻的 v．重新开始；再继续 vt.夺去，剥夺 n．耕作，栽培，培养
【佳句欣赏】 1．Since last year，the strategic focus of Project Hope has gradually been shifted from the previous widespread aid to the cultivation of excellent students and follow－up support for Hope schools. 自从去年以来，希望工程的战略焦点已经由先前大范围的 资助转换到优秀学生的培育及对希望学校的后续支持。
Since last year ， the strategic focus of Project Hope has gradually been shifted from the previous widespread aid to the cultivation of excellent students and follow－up support for Hope schools.
A.粗糙斜面上的金属球M在弹簧的作用下运动，该运动是简谐运
√动B.单摆的摆长为l，摆球的质量为m、位移为x，此时回复－力m为lgxF＝
C.质点A、C之间的距离就是简谐波的一个波长
Unit 4 Sharing
Hale Waihona Puke Baidu
【问题导读】
Read the text and try to tell if these sentences are True(T)or False(F)．
1．Project Hope has brought hope to the children who suffer from serious illness.( F )
Project Hope Project Hope has brought hope to children over the past 10 years ， said a national working conference held in Harbin on Saturday. Project Hope，which was first launched in October 1989，is a nationwide educational project to help mainly school dropouts in outlying，poverty－stricken areas resume their schooling.
√A.甲图表示砂摆摆动的幅度较大，乙图摆动的幅度较小 a B.甲图表示砂摆摆动的周期较大，乙图摆动的周期较小
√C.二人拉木板的速度不同，甲、乙木板的速度关系v甲＝2v乙 D.二人拉木板的速度不同，甲、乙木板的速度关系v乙＝2v甲 b 图2 解析
12345678
3.(改编自人教版选修3－4第12页“问题与练习”第2题)下列四幅 图中关于机械振动和机械波的说法正确的是( )
E.由图象可以求出当地的重力加速度 图1
解析
12345678
2.(改编自人教版选修3－4第13页“演示实验”)甲、乙两位同学
分别使用图2a所示的同一套装置观察单摆做简谐运动时的振动图
象，已知二人实验时所用的单摆的摆长相同，落在木板上的细砂
分别形成的
曲线如图b所示，下面关于两图线的说法中正确的是( )
谢谢观看！
教材素材再回扣 选修 3-4
12345678
1.(改编自人教版选修3－4第10页“问题与练习”第4题)如图1所 示为同一地点的两单摆甲、乙的振动图象，下列说法中正确的
√是( ) A.甲、乙两单摆的摆长相等
√B.甲摆的振幅比乙摆大
C.甲摆的机械能比乙摆大
√D.在t＝0.5 s时有正向最大加速度的是乙摆
2．The main tasks of Project Hope in the future will concentrate on building more Hope schools，strengthen the training of teachers of these schools.( T )
According to the latest statistics，Project Hope raised 1.78 billion yuan(US $ 214 million)by June,1999，which aided 2.209 million education－deprived children to go to school and 7,549 Hope schools to be built.
The main tasks of Project Hope in the future will concentrate on building more Hope schools，strengthening the training of teachers of these schools，equipping the schools with computers and related education software，and developing long－range education.
【日积月累】 1．launch 2．dropout 3．outlying 4．resume 5．deprive 6．cultivation
v．发射；发动，开展 n．退学者 adj.边远的；偏僻的 v．重新开始；再继续 vt.夺去，剥夺 n．耕作，栽培，培养
【佳句欣赏】 1．Since last year，the strategic focus of Project Hope has gradually been shifted from the previous widespread aid to the cultivation of excellent students and follow－up support for Hope schools. 自从去年以来，希望工程的战略焦点已经由先前大范围的 资助转换到优秀学生的培育及对希望学校的后续支持。