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- 1vacation,riding,bike,with,l,my,family,am,on,going.
- 2设f(x)是定义在R上的偶函数,其图象关于直线x=1对称,对任意x1,x2∈[0,1/2],都有f(x1+x2)=f(x1)•f(x2),且f(1)=a>0. (1)求f(1/2)及f(1/4); (2)证明f(x)是周期函数.
- 32000克水从50度加热到100度需要多少热量?
- 4李阿姨到新疆买了四千克葡萄,回到南京只有两千克了,在新疆葡萄的含水率是99%,但现在含水率是98%,问为
- 5He likes playing basketball.
- 6( )? My parents both work in a hospital.They are doctors.补全对话
- 7it take about 20 minutes by bike这句话对吗
- 8通常情况下,液态氧的沸点是-183℃,液态氮的沸点是-196℃,液态氦的沸点是-268.9℃利用液态空气提取气体时,
- 9我要一篇六年级水平,游长城的作文(是苏教版六年级上语文第一个习作)大家帮帮我
- 10you ____ do what your parents or teathers tell you.(could/should)