點(diǎn)擊查看2018年自學(xué)考試《英語(一)》提升練習(xí)匯總

　　(B)

　　All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds mankind. Each year it provides men with two hundred million tons of grain, and nearly ten million tons of wood.

　　Coal, oil, natural gas, and all others fuels are store-up(儲(chǔ)藏)energy from the sun. Some was collected by this season's plants as carbon compounds. Some was stored by plants and trees ages ago.

　　Even waterpower comes from the sun. Water turned into vapor by the sun falls as rain. It runs down the mountains and is turned into electric power.

　　Light transmits(傳輸)only the energy that comes from the sun's outer layers, and much of this energy never arrives on earth. About nineteenths of it is absorbed by the atmosphere of the earth. In fact, the earth itself gets only one half-billionth of the sun's entire output of radiant(輻射)energy.

　　6.All the useful energy at the surface of the earth comes ______. [ ]

　　A.directly from the sun

　　B.from the sun's activity

　　C.from energy stored by the sun

　　D.from radiation of the sun

　　7.For mankind, the sun is the source of ______. [ ]

　　A.activity B.all heat

　　C.all food D.both B and C

　　8.The sun's energy indirectly provides the earth with ______. [ ]

　　A.fuels B.waterpower

　　C.light D.both A and B

　　9.The largest part of the energy from the sun is ______. [ ]

　　A.stored by the season's plants

　　B.turned into fuel

　　C.absorbed by the earth's atmosphere

　　D.used for electric power

　　10.Of the sun's entire output of radiant energy, the earth receives ______. [ ]

　　A.nearly all B.about half

　　C.a very small part

　　D.all that come from the sun's outer layers

掃描/長(zhǎng)按二維碼即可幫助自考通關(guān)

獲取10月自考成績(jī)查詢

獲取最后6套預(yù)測(cè)卷

免費(fèi)獲取8次直播課程

獲取歷年考試真題試卷

自考萬題庫(kù)下載丨微信搜索"萬題庫(kù)自考"

　　相關(guān)推薦：

　　各地2018年自學(xué)考試報(bào)名時(shí)間及入口匯總

　　考試吧策劃：2018年自學(xué)考試報(bào)考指南專題

　　考試吧整理：各地2018年自學(xué)考試時(shí)間匯總

　　大學(xué)同學(xué)都在這樣獲取“雙學(xué)歷雙學(xué)位”��！

　　自考手機(jī)題庫(kù)上線 智能做題首選 立即下載體驗(yàn)！

　　考試吧策劃:歷年自考真題及答案在線估分專題