根据第三段中Each layer mixes into the next, like the layers of the earthˈs atmosphere(大气).可知,太阳的气体就像地球的大气层。故选C。 根据第一段中The sunˈs energy comes from its nuclear fusion(核聚变).可知,太阳的能量来自于核聚变。故选B。 根据第二段中Thatˈs more than 100 time...
Nejať's robots are designed to fill an increasing need: care-giving for the old. The population of the people over age 80 will be 426 million in 2050, three times larger than that now. Such robots could be especially useful for patients with Alzheimer's disease (老年痴呆症 ). They ...
Each layer mixes into the next, like the layers of Earth's atmosphere(大气). Most of the sun's mass is in its center. It is also very hot. Almost all fusion takes place in the centerThe sun creates energy in the form of heat and light. Even though the sun is a ball of gases...
The sun has different layers of gases. Each layer mixes into the next, like the layers of Earth’s atmosphere.( 大气 ) Most of the sun’s mass is in its center. It is also very hot. Almost all fusion takes place in the center. ...
Water turned into vapor by the sun falls as rain. It courses down the mountains and is converted to electric power. Light transmits only the energy that comes from the sun’ s outer layers, and much of this energy that is directed toward the earth never arrives. About nine-tenths of it...
Oceanscovertwo-thirdsofourEarth.Therearefivemainoceanswhichallflowintoeachother:theArcticOcean,theAtlanticOcean,theIndianOcean,thePacificOceanandtheSouthernOcean.WhataretheLayersoftheOcean?Oceansaremadeoffivelayersordepths.Eachlayerhasdifferentcharacteristics (特点),suchasthetemperatureandtheamountoflight.Theyhave...
Water (25) into vapor by the sun falls as rain. It runs (26) the mountains and is converted to electric power. Light transmits only the energy (27) comes from the sun’ s outer layers, and (28) of this energy that is directed toward the earth never arrives. About (29) of it ...
from beijing to nanji from bridges from call of the myst from candles to soap from centralized cont from changchun city from china from chinese to europ from cyberspace to st from dan to beersheba from departure to arr from door to door goi from earth from fading night from father to son ...
Lighttransmitsonlytheenergythatcomesfromthesun’souterlayers,andmuchofthisenergythatisdirectedtowardtheearthneverarrives.Aboutnine-tenthsofitisabsorbedbytheatmosphereoftheearth.Infact,theearthitselfgetsonlyonehalf-billionofthesun’sentireoutputofradiantenergy.Radiantenergyisstoredascarboncompoundsby___. A. plants...
Another way to say this isthat the sun could hold one milion earthsinside it.The sun has different layers of gases. Eachlayer mixes into the next, like the layers of theearth's atmosphere (大气). Most of the sun'smass is in its center. It is also very hot. Almostall fusion takes...