how many legs does a spider have

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• How ( )legs are there in a bee?Six.How ( )is it from your home to your school?A bout 4km.How ( )do you have Olympic Math?Twice a week.How ( ) is this pen?It's 18 yuan.
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• 英语填空 连词成句 选词填空1.用所给的词,选择其恰当的形式填空.A.have B.has C.there is D.there are 1.( )a postman at the door 2.( )many flowers on the fridge 3.can i( )a cup of tea I,m thirsty 4.A table( )four legs.Four tables( )sixteen legs.5.—How many erasers( )in your pencil-box?—Only one.6.Excuse me( )a toilet near here Yes,next to the bank.7.Our classroom( )eight windows.2.连词成句 1.want,join,i,to,sports,the ,club 2.at,keeping,good,i,m,goal 3.have,hot dogs,for,we,lunch,and,sausa
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• 汽车发动机的功率为Pο＝60Kw,汽车的质量m＝4000kg,当它行使在水平公路上时所受阻力恒为车重的k＝0.1倍...汽车发动机的功率为Pο＝60Kw,汽车的质量m＝4000kg,当它行使在水平公路上时所受阻力恒为车重的k＝0.1倍（g＝10m/s2）,②如果汽车保持Pο＝60Kw的功率由静止开始起动,经过t＝1.25s达到最大速度,求汽车从静止到最大所运行的位移X
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