My School Day in London
      Tim Hunt is telling 1 Chinese classmates about his school day in London.
     My school day in London is different 2 my school day here in China. School starts 3 nine o'clock. I get up at 7:00 4weekdays. I go to school 5 underground(地铁). It 6 about forty–five minutes. I have 7 at school. Classes are over at 3:15. It is early, 8 I stay at school and play games 9 my friends. I am 10 the basketball team. We practice(联系)on Monday 11 Wednesday. We have a match 12 Friday afternoon.
     On Saturday 13 I get up late. Then I 14 my parents tidy(弄整洁)the house and the garden. In the evening I often go to film or a club(俱乐部).On Sunday I have a good rest and of course, I do 15.

如图，一质量为m的正方体物块置于风洞内的水平面上，其一面与风速垂直，当风速为v₀时刚好能推动该物块。已知风对物块的推力F正比于Sv²，其中v为风速、S为物块迎风面积。当风速变为2v₀时，刚好能推动用同一材料做成的另一正方体物块，则该物块的质量为(  )

有关板块学说的叙述，正确的是（　　）

如图，AB∥CD，∠A=48°，∠C=22°．则∠E等于(  )