第一部分　阅读理解　(75分)

Passage　1
CATV　is　a　short　way　of　saying　'community　antenna　(天线)　television.'　But　'cable　television'　is　the　term　most　people　use.　Cable　television　allows　viewers　to　receive　TV　programs　that　they　cannot　pick　up　with　their　regular　antennas.
Television　signals　do　not　follow　the　curve　(曲线)　of　the　earth.　They　travel　in　straight　lines　in　all　directions.　Signals　from　a　TV　station　move　toward　the　horizon　(水平线)　and　then　go　into　space.　If　you　live　only　a　few　miles　from　a　station,　you　may　not　get　any　picture　at　all.
CATV　began　in　1948.　People　in　places　far　from　TV　stations　shared　the　cost　of　putting　up　high　antennas.　A　community　antenna　was　usually　placed　on　a　hill,　a　mountain,　or　on　a　high　tower.　The　antenna　picked　up　TV　signals　and　fed　them　into　a　small　local　station.　From　the　station,　thick　wires　called　cables　ran　out　to　nearby　homes.　Each　person　using　the　cable　paid　a　monthly　charge.
CATV　worked　well,　and　soon　new　uses　were　found　for　it.　Local　stations　could　feed　programs　into　empty　channels　that　were　not　in　use.　People　along　the　cable　could　have　local　news,　weather　reports,　and　farm　and　school　news　at　no　extra　charge.
Today,　cable　television　has　moved　into　cities.　It　brings　in　extra　programs　that　city　viewers　with　regular　antennas　cannot　see.　It　is　also　used　in　many　classrooms　throughout　the　country.

1.　From　the　first　paragraph　we　know　that　________.
○A.　most　people　use　cable　television
○B.　'community　antenna'　is　another　name　for　'regular　antenna'
○C.　a　community　antenna　is　used　for　cable　television
○D.　regular　antennas　cannot　pick　up　TV　signals　programs

2.　Of　the　following,　which　is　NOT　the　way　TV　signals　travel?
○A.　In　a　curve.
○B.　In　a　straight　line.
○C.　In　all　direction.
○D.　Toward　the　horizon.

3.　Cable　TV　is　becoming　more　and　popular　because　_____________.
○A.　it　is　free　of　charge
○B.　it　can　provide　more　programs
○C.　it　provides　all　TV　users　good　pictures
○D.　TV　sets　with　regular　antennas　can　also　have　a　good　reception　through　CATV
4.　On　the　whole,　this　passage　is　about　________.
○A.　how　to　put　up　high　antennas
○B.　a　way　of　picking　up　better　TV　programs
○C.　how　to　use　the　empty　channels　on　your　TV　set
○D.　the　way　that　TV　signals　are　sent

5.　From　the　passage　we　can　infer　that　__________.
○A.　TV　has　begun　to　be　used　for　educational　purposes
○B.　there　is　no　charge　for　CATV
○C.　cable　TV　cannot　be　used　in　mountainous　areas
○D.　antennas　for　cable　TV　are　usually　put　up　in　the　center　of　a　community

Passage　2
In　earliest　times,　men　considered　lightning　to　be　one　of　the　great　mysteries　of　nature.　Some　ancient　people　believed　that　lightning　and　thunder　were　the　weapons　of　the　gods.
In　reality,　lightning　is　a　flow　of　electricity　formed　high　above　the　earth.　A　single　flash　of　lightning　1.6　kilometers　long　has　enough　electricity　to　light　one　million　light　bulbs.
The　American　scientist　and　statesman,　Benjamin　Franklin,　was　the　first　to　show　the　connection　between　electricity　and　lightning　in　1752.　In　the　same　year　he　also　built　the　first　lightning　rod.　This　device　protects　buildings　from　damage　by　lightning.
Modern　science　has　discovered　that　one　stroke　of　lighting　contains　more　than　15　million　volts.　A　spark　between　a　cloud　and　the　earth　may　be　as　long　as　13　kilometers,　and　travel　at　a　speed　of　30　million　meters　per　second.
Scientists　estimate　that　there　are　about　2000　million　flashes　of　lightning　per　year.　Lightning　hits　the　Empire　State　Building　in　New　York　City　30　to　48　times　a　year.　In　the　United　States　along　it　kills　an　average　of　one　person　every　day.
The　safest　place　to　be　in　case　of　an　electrical　storm　is　in　a　closed　car.　Outside,　one　should　go　to　low　ground　and　not　get　under　trees.　Also,　one　should　stay　out　of　water　and　away　from　metal　fences.　Inside　a　house,　people　should　avoid　open　doorways　and　windows　and　not　touch　wires　or　metal　things.
With　lightning,　it　is　better　to　be　safe　than　sorry!

6.　Lightning　is　really　__________.
○A.　weapon
○B.　electricity
○C.　light
○D.　mystery

7.　People　once　though　that　lightning　came　from　__________.
○A.　scientists
○B.　ground
○C.　lightning　rod
○D.　gods

8.　One　flash　of　lightning　can　produce　enough　electricity　for　______　bulbs.
○A.　10,000
○B.　1,000
○C.　1,000,000
○D.　100

9.　Benjamin　Franklin　___________.
○A.　made　the　first　lightning　rod
○B.　invented　electricity
○C.　built　the　Empire　State　Building
○D.　prevented　Lightning　from　hitting　cars

10.　_________　is　the　best　place　to　be　during　an　electrical　storm.
○A.　Swimming　pool
○B.　a　high　ground
○C.　Under　a　tree
○D.　A　car

Passage　3
Because　of　the　energy　crisis,　scientists　in　the　oil-consuming　nations　have　become　increasingly　interested　in　the　potential(潜在的)　of　solar　energy.　Some　experts　estimate　that　the　present　supply　of　fossil　(化石)　fuel　will　not　last　until　the　end　of　the　twentieth　century.　The　problem　that　solar　energy　researchers　face　is　how　to　harness　(利用)　the　sun's　energy　effectively　and　inexpensively.　One　of　the　most　popular　methods　currently　being　tested　uses　rooftop　solar　collectors　and　underground　storage　tanks.　An　advantage　of　a　properly　working　system　of　this　type　is　that　it　will　not　create　any　environmental　pollution.　Another　advantage　of　using　solar　energy　is　that　the　cost　of　the　fuel-the　sun's　rays-is　zero.　When　a　solar　heating　system　is　working　at　maximum　(最大的)　efficiency,　it　can　provide　up　to　80　percent　of　winter　heating　needs.

11.　The　main　topic　of　this　passage　is　__________.
○A.　the　shortage　of　fossil　fuel
○B.　the　problems　that　energy　researchers　face
○C.　an　environmental　pollution　problem
○D.　an　inexpensive　energy　source

12.　One　popular　solar　heating　system　makes　use　of　__________.
○A.　roof　collectors　and　underground　storage
○B.　fossil　fuel　conversion
○C.　underground　oil　tanks
○D.　water　collection　and　evaporation

13.　The　cost　of　using　the　sun's　rays　for　heating　is　___________.
○A.　about　the　same　as　the　cost　of　fossil　fuels
○B.　several　hundred　dollars　per　year
○C.　negligible　compared　with　other　energy　sources
○D.　determined　by　the　severity　of　the　winter

14.　Which　of　the　following　describes　an　advantage　of　using　solar　energy?
○A.　There　is　little　or　no　environmental　pollution.
○B.　A　large　percentage　of　fuel　costs　can　be　saved.
○C.　Fossil　fuels　will　become　more　plentiful.
○D.　The　oil-consuming　nations　will　not　have　to　import　oil.

15.　According　to　some　experts,　the　supply　of　fossil　fuel　will　not　last　_______.
○A.　one　more　century
○B.　an　indeterminable　time
○C.　until　the　end　of　this　century
○D.　indefinitely