Thismachinegetsyougoingforyourfirsttasteoffastridingonadropbarmachine.Withthegearshifters(齿轮变速器)positionedtoallowyoueasychanging,youcanrela
This machine gets you going for your first taste of fast riding on a drop bar machine . With the
gear shifters (齿轮变速器) positioned to allow you easy changing , you can relax and speed off in
style . Equipped with 28 mm tyres and mudguard clearance , this bike can be perfectly adapted to
suit several uses 一 from commuting (通勤) through to riding the smoother country trails.
Very lightly ridden and in excellent condition . Bike has about 400 miles on it , has spent most
of its time hanging in garage and works great . Will show signs of normal mountain bike use .
64 . What can we learn from this passage ?
A . The Raleigh Equipe RW Road Bike is suitable for different purposes .
B . The Trek Supeif y World Racing Team Mountain Bike is in poor condition .
C . The Specialized Stump Jumpber Mountain Bike is the most expensive of the three .
D . It ’ s easy for people worldwide to buy the three bikes with the same shipping company .
65 . If you ordered the Raleigh Equipe RW Road Bike , you are supposed to pay about __.
A. US $ 490 .17 B . US $ 439.17 C . US $ 419.98 D. US $ 499.98
66 . What do the last two bikes have in common ?
A . Both were much ridden after being bought .
B . Both have the same transportation expense .
C . Both come from the UK and fit for mountain .
D . Both are second 一 hand and sold from the USA
AA D
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r(A*A^T)=r(A^T*A)=r(A)证明方程AX=0与A^TAX=0同解AX=0显然有A^ 2020-06-10 …
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