Unit 5 课后练习答案

Unit 5 Keys to ExercisesListening and Speaking1In a world where its populations are increasingly proactive in battling problems such as climate change, greenhouse 1) gas emissions, and rising oil prices, 2) renewable energy is not only an option —it is now considered a necessity. The sun is the 3) ultimate source of energy for our planet. Harnessing its energy holds great promise for the world’s energy needs, and it will be heavily called upon as 4) fossil fuels are depleted.Solar energy, wind power and moving water are all traditional sources of 5) alternative energy. Coal, oil and natural gas are the three kinds of fossil fuels that we have mostly depended on for our energy needs, from home heating and electricity to fuel for our automobiles and 6) mass transportation. The problem is fossil fuels are non-renewable. They are 7) limited in supply and will one day be depleted.Perhaps the best solution to 8) our growing energy challenges comes from The Union of Concerned Scientists: “No single solution can meet our society’s future energy needs. The solution instead will come from a family of 9) diverse energy technologies that share a common thread —they do not deplete our natural resources or 10)destroy our environment.”2 TipSolar energy, wind power, moving water, etc. are all sources of renewable energy. Diverse energy technologies which will not exhaust the natural resources or destroy our environment will be the best solution to the growing energy challenge.ReadingText AReading Comprehension1A.TopicSolar leases, as a new business model, are attracting new demographic.Current stateThe less affluent neighborhoods can afford solar energy.Homeowners save money the very first month.Solar leases are surging in southern California and being adopted in less affluent neighborhoods. There is a positive correlation between affluent and less affluent customers.There is an attraction for third-party solar leases in less affluent neighborhoods.Future expectat ion It might attract an additional 13 million Americans, which could push solar energy into the mainstream .BThe Advantages S u p p o r t i n gE v i d e n c eLeasing opens solar to new markets A c c o ri n gt oN R E L ’sE a s a nD r u r y ,l e a s i n g ,an e wbs i n e s sm o d e l ,p i c k e du pan e wc u s t o m e rd e m or a p h i c .Immediate savings is a lure I ti se s t i m a t e db yt h eS o l a rC i t yt htt h eL a m m e r sw o u l di nt h ee n ds a v em o r et hn$ 9 , 0 0 0.NREL employees b ring their work ho me T h eN R E Le m p l o y e e s ,s u c ha sH e a t hrL a m m e r s ,M i c h a e lM e n d e l s o h n ,a n dL o r iB i r,b e g a nt ou s et h es o l a re n e r g yi nd i f fe r e nw a y s .Sun can power ele ctric cars A c c o r d i n gt ot h eL a r m m e r s , w i t ht h ee xr ad r a wo fe l e c t r i c i t y,t h e yw o u l dh o p e f u lyg e ta l lt h e i rh o u s e h o l d se l e c t r i c i t yn e e da n da b o u tt w o -t h i r d so ft h ee l e c t r i cc a r ’sf u e ln e e d sv i at h es u n .The Advantage s S u p p o r t i n gE v i d e n c eSolar prices are dropping sharply h ed r o pi nt h ep r i c e so fs o l a rp a n e l sa n dtec o s to fi n s t a l l i n gt h es y s t e ma l s oh a spa y e das i g n i f i c a n tr o l ei nt h eg r o w t ho ft hs o l a rm a r k e t .Advice I t ’sb e t t e rt os h o pa r o u n d ,bc a u s el e a s et e r m sv a r ys i g n i f i c a n t l yb e t w e ed i f fe r e n tc o m p a n i e s .C l i e n t ss h o u l dd oars e a r c ha sb r o a da sp o s s i b l et om a k es u r ewa tt h ed i f fe r e n to f f e r i n g sa r ea n dw h e t h e rheyunderstandthetermsofthelease.21)$150,000 or more; third-party-leased solar panels; $100,000 or more2)buying and leasing; 62% of the electricity for their two-story home; more than $9,0003)no upfront cost; $22 per month; most of his electric bill4)Our long-term plan; a range of about 80 miles5)the average installed cost; about $7 per watt; outpaced supply; a main ingredient3For reference1) People who are less affluent than those most likely to go for the customer-owned option, who are environmentally conscious, are the likely target customers for third-party solar panel leases.2) Without doubt, human beings and other creatures on the earth will benefit the most from new energy utilization, which promises a better environment for them to live in. Besides, the companies with state-of-the-art technologies for utilizing new energy would benefit from the great market of clean energy.The energy companies which lack the necessary skills to utilize new forms of energy might lag behind and gradually lose markets.Language in Use4lure noun >>> verb : lureoffset noun>>>verb: offsetpresumably adverb>>>verb: presumerenewable adjective>>>verb: renewmortgage noun>>>verb: mortgagedetached adjective>>>verb: detachemission noun>>>verb: emitcontemplation noun>>>verb: contemplate1)renewed 2) offset 3)emitted 4) contemplating 5) detached6)residential 7)lease(s) 8) mortgaged 9)lures 10)presume51)a. check out b. checked against2)a. sign in b. signed on/ up3)a. Put down b. put on4)a. drove...up b. driven out5)a. Are eligible to b. be eligible for61)All that we need2)something they can3)something we’ve wanted but thought we’d never be able to afford4)something that allows us to have light to see in the dark; something that allows us to have heat to cook our food; something that makes our cars move, airplanes fly and ships sail5)There are indications that6)There is some indication that7)There were indications that8)Statistics show that9)According to statistics10)According to official statistics71)a. sharp rise b. a sharp eye c. sharp minds2)a. a heavy blow b. heavy knocks c. a heavy responsibility3)a. high priority b. high regard c. high spirits4)a. live animals b. live performance c. a live issue5)a. a poor vocabulary b. poor nutrition c. a poor background6)a. regular customers b. regular exercise c. regular staff8Reference translation1) 比起“十年内自动还清”的乏味广告，将光伏产品的价值重新打包为一个简单的每月电费节省清单更具吸引力。