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1.¡¡a¡¡major¡¡step¡¡in¡¡the¡¡development¡¡of¡¡algebra¡¡was¡¡the¡¡evolution¡¡of¡¡an¡¡accurate¡¡understand¡¡of¡¡negative¡¡quantities.

2.¡¡if¡¡television¡¡had¡¡been¡¡invented¡¡a¡¡thousand¡¡years¡¡ago,¡¡will¡¡nations¡¡be¡¡significantly¡¡more¡¡homogeneous¡¡than¡¡they¡¡are¡¡now?

3.¡¡to¡¡the¡¡citizens¡¡of¡¡the¡¡united¡¡states,¡¡the¡¡bald¡¡eagle,¡¡america¡¯s¡¡national¡¡bird,¡¡symbolize¡¡strength¡¡and¡¡freedom.

4.¡¡authenticity¡¡stained¡¡glass¡¡is¡¡colored¡¡while¡¡the¡¡glass¡¡is¡¡in¡¡a¡¡liquid¡¡state.

5.¡¡on¡¡most¡¡scales,¡¡zero¡¡marks¡¡the¡¡starting¡¡point¡¡or¡¡the¡¡neutralize¡¡position.

6.¡¡traditionally,¡¡ethnographers¡¡and¡¡linguists¡¡have¡¡paid¡¡little¡¡attention¡¡to¡¡cultural¡¡interpretations¡¡given¡¡to¡¡silence,¡¡or¡¡to¡¡the¡¡types¡¡of¡¡social¡¡contexts¡¡in¡¡which¡¡tends¡¡to¡¡occur.

7.¡¡the¡¡research¡¡of¡¡percy¡¡julian¡¡has¡¡contributed¡¡to¡¡the¡¡creation¡¡of¡¡drugs¡¡that¡¡are¡¡in¡¡widespread¡¡use¡¡over¡¡victims¡¡of¡¡arthritis.

8.¡¡the¡¡appalachian¡¡trail,¡¡extending¡¡approximately¡¡2020¡¡miles¡¡from¡¡maine¡¡to¡¡georgia,¡¡is¡¡the¡¡longer¡¡continuous¡¡marked¡¡footpath¡¡in¡¡the¡¡world.

9.¡¡when¡¡rainbows¡¡appear,¡¡they¡¡are¡¡always¡¡in¡¡the¡¡part¡¡of¡¡the¡¡sky¡¡opposite¡¡directly¡¡the¡¡sun.

10.¡¡benjamin¡¡franklin¡¡drew¡¡a¡¡political¡¡cartoon¡¡that¡¡is¡¡credited¡¡raising¡¡10000¡¡volunteers¡¡for¡¡the¡¡american¡¡revolutionary¡¡war.

11.¡¡luminescence¡¡refers¡¡to¡¡the¡¡emission¡¡of¡¡light¡¡by¡¡means¡¡another¡¡than¡¡heat.

12.¡¡george¡¡washington¡¡carver¡¡found¡¡hundred¡¡of¡¡uses¡¡for¡¡the¡¡peanut,¡¡the¡¡sweet¡¡potato,¡¡and¡¡the¡¡soybean¡¡and¡¡thus¡¡stimulated¡¡the¡¡cultivation¡¡of¡¡these¡¡crops.

13.¡¡since¡¡1971¡¡the¡¡regional¡¡corporations¡¡set¡¡up¡¡in¡¡alaska¡¡by¡¡congress¡¡managing¡¡everything¡¡from¡¡fishing¡¡to¡¡banking.

14.¡¡the¡¡metal¡¡aluminum¡¡has¡¡been¡¡first¡¡isolated¡¡early¡¡in¡¡the¡¡nineteenth¡¡century.

15.¡¡the¡¡boiled¡¡point¡¡of¡¡any¡¡liquid¡¡is¡¡determined¡¡by¡¡the¡¡pressure¡¡of¡¡the¡¡surrounding¡¡gases.

16.¡¡on¡¡may¡¡20,¡¡1932,¡¡amelia¡¡earhart¡¡became¡¡the¡¡first¡¡woman¡¡fly¡¡solo¡¡across¡¡the¡¡atlantic¡¡ocean.

17.¡¡industrial¡¡buyers¡¡are¡¡responsible¡¡for¡¡supplying¡¡the¡¡goods¡¡and¡¡services¡¡that¡¡an¡¡organization¡¡required¡¡for¡¡is¡¡operations.

18.¡¡the¡¡field¡¡of¡¡dynamics¡¡in¡¡physics¡¡is¡¡concerned¡¡with¡¡a¡¡particle¡¯s¡¡motion¡¡in¡¡relation¡¡to¡¡the¡¡forces¡¡acting¡¡it.

19.¡¡the¡¡origins¡¡of¡¡the¡¡democratic¡¡party¡¡is¡¡orten¡¡traced¡¡to¡¡the¡¡coalition¡¡formed¡¡behind¡¡thomas¡¡jefferson¡¡in¡¡the¡¡1790¡¯s¡¡to¡¡resist¡¡the¡¡policies¡¡of¡¡george¡¡washington¡¯s¡¡administration.

20.¡¡it¡¡has¡¡been¡¡calculated¡¡that¡¡the¡¡earth¡¯s¡¡circumference¡¡around¡¡the¡¡equator¡¡is¡¡over¡¡forty¡¡longer¡¡miles¡¡than¡¡the¡¡circumference¡¡around¡¡the¡¡two¡¡poles.

21.¡¡the¡¡first¡¡libraries¡¡in¡¡the¡¡north¡¡american¡¡colonies¡¡was¡¡established¡¡in¡¡massachusetts¡¡in¡¡the¡¡year¡¡1638.

22¡¡how¡¡many¡¡people¡¡remember¡¡listening¡¡to¡¡orson¡¡welles¡¯1938¡¡radio¡¡broadcast.¡¡¡°the¡¡war¡¡of¡¡the¡¡world,¡±¡¡which¡¡convince¡¡thousands¡¡that¡¡space¡¡aliens¡¡had¡¡invaded¡¡the¡¡earth?

23.¡¡pewter,¡¡a¡¡metal¡¡with¡¡an¡¡ancient¡¡heritage,¡¡is¡¡still¡¡practical¡¡medium¡¡for¡¡the¡¡nonprofessional¡¡metalworker.

24.¡¡a¡¡principle¡¡of¡¡manager¡¡is¡¡to¡¡ensure¡¡that¡¡every¡¡action¡¡or¡¡decision¡¡achieves¡¡a¡¡carefully¡¡planned¡¡goal.

25.¡¡a¡¡good¡¡exercise¡¡program¡¡helps¡¡teach¡¡people¡¡to¡¡avoid¡¡the¡¡habits¡¡that¡¡might¡¡shorten¡¡the¡¡lies.

26.¡¡researchers¡¡at¡¡the¡¡university¡¡of¡¡colorado¡¡are¡¡investigating¡¡a¡¡series¡¡of¡¡indicators¡¡that¡¡could¡¡help¡¡themselves¡¡to¡¡predict¡¡earthquakes.

27.¡¡a¡¡common¡¡use¡¡with¡¡gold¡¡in¡¡the¡¡in¡¡nineteenth¡¡century¡¡was¡¡as¡¡a¡¡standard¡¡for¡¡the¡¡value¡¡of¡¡money.

28.¡¡mahogany¡¡is¡¡often¡¡considered¡¡the¡¡finest¡¡cabinet¡¡wood¡¡because¡¡they¡¡has¡¡most¡¡of¡¡the¡¡qualities¡¡desired¡¡for¡¡furniture¡¡making.

29.¡¡a¡¡hologram¡¡is¡¡a¡¡pattern¡¡usually¡¡made¡¡on¡¡film¡¡in¡¡that¡¡can¡¡create¡¡a¡¡three-dimensional¡¡image¡¡of¡¡scene.

30.¡¡principal¡¡known¡¡for¡¡his¡¡dictionary,¡¡noah¡¡webster¡¡was¡¡also¡¡the¡¡first¡¡epidemiologist¡¡in¡¡the¡¡united¡¡states.

31.¡¡almanacs¡¡in¡¡simple¡¡form¡¡have¡¡been¡¡known¡¡from¡¡the¡¡invention¡¡of¡¡writing.

32.¡¡the¡¡relationship¡¡of¡¡latin¡¡american¡¡music¡¡to¡¡black¡¡music¡¡in¡¡the¡¡united¡¡states¡¡is¡¡clearly¡¡evident¡¡in¡¡the¡¡unaccented¡¡beats¡¡that¡¡are¡¡common¡¡to¡¡either.

33.¡¡the¡¡methods¡¡of¡¡spectrum¡¡analysis¡¡vary¡¡according¡¡to¡¡the¡¡wavelength¡¡region¡¡were¡¡studied.

34.¡¡harvesting¡¡of¡¡grains¡¡is¡¡affected¡¡by¡¡annual¡¡changes¡¡in¡¡temperature¡¡or¡¡in¡¡the¡¡amount¡¡of¡¡moisture,¡¡but¡¡both.

35.¡¡a¡¡patent¡¡gives¡¡inventors¡¡exclusive¡¡rights¡¡to¡¡their¡¡inventions¡¡for¡¡a¡¡fix¡¡period¡¡of¡¡time.

36.¡¡a¡¡statue,¡¡a¡¡monumental,¡¡a¡¡building,¡¡or¡¡a¡¡park¡¡may¡¡be¡¡dedicated¡¡to¡¡commemorate¡¡a¡¡distinguished¡¡individual.

37.¡¡the¡¡elbows¡¡are¡¡joints¡¡that¡¡connect¡¡people¡¯s¡¡up¡¡arms¡¡with¡¡their¡¡forearms.

38.¡¡a¡¡musician¡¡with¡¡multiply¡¡talents,¡¡atetha¡¡franklin¡¡is¡¡able¡¡to¡¡write¡¡songs¡¡that¡¡are¡¡unusually¡¡consistent¡¡in¡¡style¡¡and¡¡content.

39.¡¡sociological¡¡studies¡¡have¡¡found¡¡that¡¡deeply¡¡hold¡¡values¡¡and¡¡principles¡¡are¡¡highly¡¡resistant¡¡to¡¡change.

40

  


.¡¡benjamin¡¡franklin¡¡make¡¡the¡¡first¡¡bifocal¡¡spectacles¡¡for¡¡self¡¡by¡¡sawing¡¡the¡¡lenses¡¡of¡¡his¡¡eyeglasses¡¡in¡¡half.

41.¡¡moles¡¡are¡¡almost¡¡completely¡¡blind,¡¡although¡¡its¡¡tiny¡¡eyes¡¡can¡¡distinguish¡¡light¡¡from¡¡dark.¡¡

42.¡¡the¡¡cubist¡¡movement¡¡in¡¡art¡¡was¡¡a¡¡reaction¡¡against¡¡traditional¡¡methods¡¡of¡¡portray¡¡reality.¡¡

43.¡¡certain¡¡types¡¡of¡¡computers¡¡work¡¡properly¡¡only¡¡in¡¡environments¡¡with¡¡controlled¡¡precisely¡¡temperatures.

44.¡¡the¡¡belief¡¡in¡¡fairies¡¡have¡¡existed¡¡from¡¡earliest¡¡times,¡¡and¡¡the¡¡literature¡¡of¡¡many¡¡countries¡¡includes¡¡tales¡¡of¡¡fairies¡¡and¡¡their¡¡relationship¡¡to¡¡humans.

45.¡¡acrylic¡¡paint¡¡enables¡¡artists¡¡to¡¡experiment¡¡with¡¡many¡¡colors¡¡effects.

46.¡¡salt¡¡lake¡¡city,¡¡utah¡¯s¡¡capital¡¡and¡¡largest¡¡city,¡¡is¡¡industrial¡¡and¡¡banking¡¡center.

47.¡¡people¡¡can¡¡remember¡¡more¡¡information¡¡for¡¡higher¡¡periods¡¡of¡¡time¡¡when¡¡they¡¡use¡¡more¡¡than¡¡one¡¡sense¡¡in¡¡the¡¡process¡¡of¡¡learning.

48.¡¡flower¡¡have¡¡long¡¡been¡¡cultivated¡¡and¡¡bred¡¡for¡¡their¡¡beauty¡¡and¡¡their¡¡fragrance.

49.¡¡the¡¡united¡¡states¡¡constitution¡¡requires¡¡that¡¡president¡¡be¡¡a¡¡natural-born¡¡citizen,¡¡thirty-five¡¡years¡¡of¡¡age¡¡or¡¡be¡¡older,¡¡who¡¡has¡¡lived¡¡in¡¡the¡¡united¡¡states¡¡for¡¡a¡¡minimum¡¡of¡¡fourteen¡¡years.

50.¡¡the¡¡most¡¡substances¡¡expand¡¡in¡¡volume¡¡when¡¡they¡¡are¡¡heated.

51.as¡¡inevitably¡¡as¡¡human¡¡culture¡¡has¡¡changed¡¡with¡¡the¡¡passing¡¡of¡¡time,¡¡so¡¡does¡¡the¡¡environment.

52.¡¡mexican¡¡jumping¡¡beans¡¡are¡¡actually¡¡seeds¡¡in¡¡which¡¡contain¡¡moth¡¡larvae¡¡whose¡¡activity¡¡causes¡¡the¡¡seeds¡¡to¡¡¡°jump¡±.

53.¡¡data¡¡received¡¡from¡¡two¡¡spacecraft¡¡indicate¡¡that¡¡there¡¡is¡¡many¡¡evidence¡¡that¡¡huge¡¡thunderstorms¡¡are¡¡now¡¡occurring¡¡around¡¡the¡¡equator¡¡of¡¡the¡¡plant¡¡saturn.

54.¡¡per¡¡capita¡¡income¡¡is¡¡a¡¡nation¡¯s¡¡entire¡¡income¡¡dividing¡¡by¡¡the¡¡number¡¡of¡¡people¡¡in¡¡the¡¡nation.

55.¡¡for¡¡centuries¡¡waterwheels¡¡were¡¡the¡¡only¡¡sources¡¡of¡¡power¡¡aside¡¡from¡¡human¡¡and¡¡animal¡¡strong.

56.¡¡the¡¡age¡¡of¡¡a¡¡geological¡¡sample¡¡can¡¡be¡¡estimated¡¡from¡¡the¡¡ratio¡¡of¡¡radioactive¡¡to¡¡nonradioactive¡¡carbon¡¡present¡¡in¡¡the¡¡object¡¡is¡¡examined.

57.¡¡salmon¡¡spend¡¡most¡¡of¡¡their¡¡adult¡¡lives¡¡in¡¡salt¡¡water,¡¡despite¡¡they¡¡return¡¡to¡¡their¡¡freshwater¡¡birthplaces¡¡to¡¡spawn¡¡and¡¡die.

58.¡¡porcelain¡¡is¡¡not¡¡a¡¡single¡¡clay,¡¡and¡¡a¡¡compound¡¡of¡¡kaolin,¡¡ball¡¡clay,¡¡feldspar,¡¡and¡¡silica.

59.¡¡the¡¡dromedary¡¡camel¡¡is¡¡raised¡¡especially¡¡to¡¡racing.

60.¡¡the¡¡texture¡¡of¡¡soil¡¡is¡¡determined¡¡by¡¡the¡¡size¡¡of¡¡the¡¡grains¡¡or¡¡particles¡¡that¡¡make¡¡up.

61.¡¡all¡¡matter¡¡resists¡¡any¡¡change¡¡in¡¡their¡¡condition¡¡of¡¡rest¡¡or¡¡of¡¡motion.

62.¡¡like¡¡some¡¡other¡¡running¡¡birds,¡¡the¡¡sanderling¡¡lacks¡¡a¡¡back¡¡toe¡¡and¡¡has¡¡a¡¡three-toed¡¡feet.

63.¡¡large¡¡bodies¡¡of¡¡water¡¡and¡¡the¡¡prevalence¡¡of¡¡moisture-bearing¡¡winds¡¡often¡¡produce¡¡a¡¡condition¡¡of¡¡tall¡¡humidity,¡¡affecting¡¡the¡¡local¡¡weather.

64.¡¡a¡¡thorough¡¡study¡¡of¡¡mythology¡¡requires¡¡familiarity¡¡for¡¡the¡¡properties¡¡of¡¡plants¡¡and¡¡trees,¡¡and¡¡the¡¡habits¡¡of¡¡wild¡¡birds¡¡and¡¡beasts.

65.¡¡seismology¡¡has¡¡not¡¡reached¡¡yet¡¡the¡¡stage¡¡where¡¡earthquakes¡¡can¡¡be¡¡foretold¡¡with¡¡a¡¡great¡¡deal¡¡of¡¡accuracy.¡¡

66.¡¡at¡¡night¡¡the¡¡desert¡¡floor¡¡radiates¡¡heat¡¡back¡¡into¡¡the¡¡atmosphere¡¡and¡¡temperature¡¡may¡¡be¡¡drop¡¡to¡¡near¡¡freezing.

67.¡¡the¡¡continental¡¡divide¡¡refers¡¡to¡¡an¡¡imaginary¡¡line¡¡in¡¡the¡¡north¡¡american¡¡rockies¡¡that¡¡divides¡¡the¡¡waters¡¡flowing¡¡into¡¡the¡¡atlantic¡¡ocean¡¡from¡¡it¡¡flowing¡¡into¡¡the¡¡pacific.

68.¡¡in¡¡every¡¡society¡¡there¡¡are¡¡norms¡¡that¡¡say¡¡individuals¡¡how¡¡they¡¡are¡¡supposed¡¡to¡¡behave.

69.¡¡due¡¡to¡¡the¡¡refraction¡¡of¡¡light¡¡rays,¡¡this¡¡is¡¡impossible¡¡for¡¡the¡¡naked¡¡eye¡¡to¡¡determine¡¡the¡¡exact¡¡location¡¡of¡¡a¡¡star¡¡close¡¡to¡¡the¡¡horizon.

70.¡¡birds¡¯¡¡eggs¡¡vary¡¡greatly¡¡of¡¡size,¡¡shape,¡¡and¡¡color.

71.¡¡one¡¡of¡¡the¡¡most¡¡difficult¡¡questions¡¡in¡¡defining¡¡sleep¡¡is¡¡¡°what¡¡is¡¡the¡¡functions¡¡of¡¡sleep?¡±

72.¡¡seven¡¡of¡¡planets¡¡rotate¡¡in¡¡the¡¡same¡¡direction¡¡as¡¡their¡¡orbital¡¡motions,¡¡while¡¡venus¡¡and¡¡uranus¡¡rotate¡¡in¡¡the¡¡opposite¡¡direction.

73.¡¡a¡¡microphone¡¡enables¡¡a¡¡soft¡¡tone¡¡to¡¡be¡¡amplified,¡¡thus¡¡making¡¡it¡¡possible¡¡the¡¡gentle¡¡renditions¡¡of¡¡romantic¡¡love¡¡songs¡¡in¡¡a¡¡large¡¡hall.

74.¡¡atrophy¡¡is¡¡a¡¡decrease¡¡in¡¡size¡¡of¡¡a¡¡cell,¡¡organ,¡¡tissues,¡¡or¡¡other¡¡part¡¡of¡¡the¡¡body¡¡such¡¡as¡¡a¡¡limb.

75.¡¡physical¡¡fitness¡¡activities¡¡can¡¡lead¡¡to¡¡an¡¡alarming¡¡variety¡¡of¡¡injuries¡¡if¡¡participants¡¡push¡¡themselves¡¡greatly¡¡hard.

76.¡¡the¡¡structure¡¡or¡¡behavior¡¡of¡¡many¡¡protozoa¡¯s¡¡are¡¡amazingly¡¡complex¡¡for¡¡single-celled¡¡animals.¡¡

77.¡¡the¡¡word¡¡¡°shore¡±¡¡can¡¡be¡¡used¡¡rather¡¡of¡¡¡°coast¡±¡¡to¡¡mean¡¡the¡¡land¡¡bordering¡¡the¡¡sea.

78.¡¡a¡¡fable¡¡is¡¡usually¡¡a¡¡short¡¡tale¡¡featuring¡¡animals¡¡or¡¡inanimate¡¡objects¡¡that¡¡can¡¡talk¡¡and¡¡think¡¡alike¡¡humans.

79.¡¡since¡¡flounders¡¡have¡¡markings¡¡that¡¡blend¡¡with¡¡their¡¡surroundings,¡¡it¡¡can¡¡lie¡¡camouflaged¡¡on¡¡the¡¡bottom¡¡of¡¡the¡¡ocean.

80.¡¡the¡¡aging¡¡process¡¡is¡¡not¡¡entirely¡¡determined¡¡by¡¡heredity,¡¡but¡¡is¡¡influenced¡¡by¡¡different¡¡environmental¡¡and¡¡social¡¡circumstances¡¡as¡¡good