内容正文:
(B)
走向假期
The populatiun gecblem my te the 1 te of the wecld today.The wudd's pepulati is
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poting 2.Two theusand years ago.there were only 250 millioe people 3 the earth.Fuur
ledred years agn.the mmler wa 4 500 million.But at the beginning of the 5 cemtury,
(A)
the wurldl's poulation wa about I.700 million.In 1970,thi menber was 3,600 milln.In 1990,
eren frm populr thongts.smeti%u(液落)ate女ba*er.is caused
the manber wa five hillion.
sia,(掬春in the hod。【,HINI fhu hae boen车cvaling in m pouts ie ther wurl.
A f wpont sail that the wreld's population 7 six hillin ly the end of ther 20th cmntury.
Some stukies hae srn shomn that me of 2 ways of spreading the vines is teugh the ar when
This is j用书arit9 we hillion,The UN estimned估i计o,pulation wil
3 A/HINI flu suffnr couhs or mneeses.Hokover.the virss can sometimes spnud ly
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(C)
7,A.
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