中学生百科英语2 : Thou ghts & Notions 0 1 The Zipper02 The Po sta ge Sta m p03 P e n c ils and Pens04 Th e Umbrella0 5 Th e Me t r i c Syste m06 Thai Bo xin g07 S u mo Wres t ling08Tar a humara Fo o t Races0 9 Olympic Sport s10 G r e ata thletes11 The P u f f e r Fis h12 Foo ds from Ar o u n d the Wo r l d13 Chocolate14 T he Blue Revolution15 T wen t y-One Day s W i tho ut Foo d16 Th e Marie Cel es t e1 7 The R o a no k e S ettlement18 The E aster Isl a nd St atues19 The Tu n guska F i reb al l2 0 M yst ery o f t he M onar c hs21 Th e H i s tory of Mo ne y2 2 Mass M a r ke tin g23 I n fla t io n2 4 Do i ng B usiness A r o u nd the World2 5 Cr e d it Cards1 The Z i p perThe zipp e r i s a won d er ful inventio n、 How did people ev e r l iv e w ithout zi p per s?The y a re v ery mon, so w e fo rg et t h at th e y ar e wo n de r ful、 T he y ar e very s t rong,but they op en a nd c lo se ve ry easily、 Th ey e in m any c olo rs an d s i z e s、In the 1890 s, p e op l e in th e U nit e d States wore high s h oe s wi th a lon g row of button s、 Cl o th es oft e n h a d r ow s of but t ons, too、 Peop l e wished t ha t clo th e s were easier to put on an d take off、Whitb L 、 Judson, an engin e e r f rom the U nited Stat e s, i nvent ed the zip p e r in 1 8 93、 How e ver, his z ipp ers d idn't stay closed v ery well、 T h is wa s e mbarrassing, a n d p eo ...