题目内容

已知点A(2,4,n),B(3,7,5),C(m,10,9)三点共线,则m=______,n=______。

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点(4,-3,6)到z轴的距离为_______

点P(1,2,3)关于xoy面的对称点为(p1,p2,p3),关于yoz面的对称点为(p4,p5,p6),关于x轴的对称点为(p7,p8,p9),关于原点的对称点为(p10,p11,p12)。这里p1=_____,p2=_____,p3=_____,p4=_____,p5=_____,p6=_____,p7=_____,p8=_____,p9=_____,p10=_____,p11=_____,p12=_____。

Unit4ListeningTask3Ms.Bergiscashingsometravelers'checksatabank.Listentoherconversationwithabankclerkanddecidewhetherthefollowingstatementsaretrueorfalse.Thenwritekeywordstosupportyouranswers.1.Ms.BergisalreadyinChinanow.2.Banksarebetterbecausetheyofferbetterexchangerates.3.Thereisabitdifferencebetweencashingtravelers'checksathotelsandatbanks.4.Ms.Bergneedstoprovidethebankwithherpassportnumber.

If peoplethink about time as their most valuable , they would make meetings more.

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