题目What cycle keeps the air fresh? ___. A. the water cycle B. the carbon cycle C. the oxygen cycle D. the nitrogen cycle 相关知识点: 试题来源: 解析 C。原因:文中提到生物呼吸氧气排出二氧化碳,植物吸收二氧化碳释放氧气,这个氧气循环使空气保持新鲜。
i just got off the ph i just have one probl i just lonely i just love my girl i just think this is i just wanna be the o i just wanna be your i just wanna cry i just wanna live whi i just wanna stay in i just want to feel y i just wanted you to i just work here ...
at any given part of the water cycle.T here are three phasesthat make up the water cycle.T hese phases are condensation,precipitation,and evaporation.②Condensation is when water vapor in the airturns to liquid.T emperature and air pressurehave a lot to do with condensation.Warm aircan ...
itll leave you withou its a deal its a little too late its a long way to the its a marriage its a matter of fact its a rhythmic work s its a simple idea and its a simple suggesti its a stuffed animal its a theoretical pos its a vicious cycle its academic its all bout the cl...
C.KéréisthefirstmalewinnerofthePritzkerPrize. D.KéréwasquitepleasedtowinthePritzkerPrize. 30分钟能力强化组合练(二) 第6页 6 ( )2.WhydoesKéréusuallyusebricksmadeoflocalclayandcement? A.Tomakebuildingsstronger. B.Tokeepcoolinhotweather. C.Toprotectstudentsfromrain. D.Toensurebetterindoorairflow...
The problem with unhealthy competition is that it's a neverending cycle. There will always be someone in front of you. What you should do is just run your own race and wish others well. 阅读理解 Some of my classmates said that they were busy going to school and doing their homew...
An air cycle machine is a system that provides fresh, temperature-controlled air to an airplane cabin. The way an air cycle...
Meanwhile, most young people in the West are expected to leave what could be life's most momentous decision—marriage—almost entirely up to luck. 同时,人们认为西方的大多数年轻人把婚姻这一可能是人生最重要的决定几乎完全交由命运来安排。 柯林斯高阶英语词典 He drinks what is left in his glass ...
A cyclical industry is sensitive to the business cycle, meaning revenues are higher in periods of economic prosperity, and lower in periods of downturn.
He is now 31 years old. When he became sick in college, his doctor asked him to go out more often for sunlight, exercise and fresh air. 1 A birdwatcher needs to know a lot and be brave and strong. Goenarto spends most of his time working in the wild. He knows where and when...