视频选集 同学们，你说，我们为什么要努力？ [1]--Unit1 [2]--Unit2 [3]--Unit3 [4]--Unit4 [5]--Unit5 [6]--Unit6 [7]--Unit7 [8]--Unit8 [9]--Unit9 [10]--Unit10 [11]--Unit11 [12]--Unit12 [13]--Unit13 [14]--Unit14 [15]--Unit15 [16]--Unit16 [17]--Unit17 [18]--Unit18 [19]--Unit19 [20]--Unit20 [21]--Unit21 [22]--Unit22 [23]--Unit23
![[1]--Unit1](http://i1.hdslb.com/bfs/storyff/n250831sa2ayrg7h7p401i1ppf96676o_firsti.jpg)
![[2]--Unit2](http://i2.hdslb.com/bfs/storyff/n250831sa2dx1ktazbn9441ancxzzssa_firsti.jpg)
![[3]--Unit3](http://i2.hdslb.com/bfs/storyff/n250831sa88a1zc1v7783ms0h4p8vjv0_firsti.jpg)
![[4]--Unit4](http://i0.hdslb.com/bfs/storyff/n250831saue7n2riv4gz52c58lvzvj4a_firsti.jpg)
![[5]--Unit5](http://i1.hdslb.com/bfs/storyff/n250831sagidj10k6topetoyhzutuq0j_firsti.jpg)
![[6]--Unit6](http://i1.hdslb.com/bfs/storyff/n250831sasn249f7zghoi2v9uhan59ui_firsti.jpg)
![[7]--Unit7](http://i0.hdslb.com/bfs/storyff/n250831sabgf5mxxz2doj1n3abxedttp_firsti.jpg)
![[8]--Unit8](http://i2.hdslb.com/bfs/storyff/n250831sa2aymeghqsnit53ag9y34gl3_firsti.jpg)
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![[10]--Unit10](http://i1.hdslb.com/bfs/storyff/n250831sa2ef9z93d8wvw22o08d2ah9x_firsti.jpg)
![[11]--Unit11](http://i0.hdslb.com/bfs/storyff/n250831sa1w7xgqy1hzf8attj4zf4a3s_firsti.jpg)
![[12]--Unit12](http://i0.hdslb.com/bfs/storyff/n250831sa3chbhd80to64komhu6n91ze_firsti.jpg)
![[13]--Unit13](http://i0.hdslb.com/bfs/storyff/n250831sa1o3e20chkmu0u1r3wp72fte_firsti.jpg)
![[14]--Unit14](http://i1.hdslb.com/bfs/storyff/n250831sa1s7zo485e44ho30y3s8xvxf_firsti.jpg)
![[15]--Unit15](http://i0.hdslb.com/bfs/storyff/n250831sa1r5awim5h5x7i2ikdcrp47l_firsti.jpg)
![[16]--Unit16](http://i2.hdslb.com/bfs/storyff/n250831sa3me48ik2dfxjb1h8p7jo8xm_firsti.jpg)
![[17]--Unit17](http://i2.hdslb.com/bfs/storyff/n250831salg1iknzzeczlwxhw4ksltz9_firsti.jpg)
![[18]--Unit18](http://i2.hdslb.com/bfs/storyff/n250831sa1nfamnda0by78194fyrqry6_firsti.jpg)
![[19]--Unit19](http://i0.hdslb.com/bfs/storyff/n250831sa1wovh4u19n1x1fore0nbocf_firsti.jpg)
![[20]--Unit20](http://i1.hdslb.com/bfs/storyff/n250831sa1mrg55ccv7qjz29l6j44c36_firsti.jpg)
![[21]--Unit21](http://i2.hdslb.com/bfs/storyff/n250831sa3p7ws7tec1i5k3csqtyck19_firsti.jpg)
![[22]--Unit22](http://i1.hdslb.com/bfs/storyff/n250831sa3bds6ayuw1wil5hu0rgbnu9_firsti.jpg)
![[23]--Unit23](http://i2.hdslb.com/bfs/storyff/n250831sa2puhdwow8q61m1o5jrcwg4w_firsti.jpg)