Participants should have basic cycling knowledge and ensure that they can control the bicycles properly during uphill and downhill 參加者應懂得基本駕駛單車技術,能掌握上斜和落斜之技術。
The conclusion is that if an appropriate refrigerant mixture is used , the lhr cycle can have a relatively higher thermodynamic efficiency than that of basic cycle , in case their pressure ratios are the same . the thermodynamic efficiency can be further improved when the acr cycle is used 研究結果表明,正確地選擇混合工質(zhì),在相同的壓比下,可使lhr循環(huán)比基本循環(huán)具有更高的熱力學效率,而采用acr循環(huán)可以較lhr循環(huán)更進一步提高循環(huán)的熱力學效率。
Based on these , the tracks , characters and causes of economic periodic fluctuation in our country are emphasized . the characters and reasons of district economic periodic fluctuation are put forward . in the second chapter , the method of determining the basic cycle is introduced 本論文正是以此出發(fā),在第一章中討論了經(jīng)濟增長與經(jīng)濟波動之間的關系,闡明了經(jīng)濟周期的涵義,并介紹了解釋經(jīng)濟周期發(fā)生原因的各種理論;同時著重說明了我國經(jīng)濟周期波動的軌跡、特征及產(chǎn)生原因;論述了我國地區(qū)經(jīng)濟周期波動的特征和原因。