题目

人们常用“一年无四季，一日见四季”来形容青藏高原的气候特色；在青海西宁地区有一首歌谣：“古城气候总无常，一日须携四季装。山下百花山上雪，日愁暴雨夜愁霜。” 8、下列解释正确的有( ) ①“一年无四季，一日见四季”——青藏高原气温的年变化、日变化都较大 ②“一日须携四季装”——气候的大陆性强，气温日较差大 ③“山下百花山上雪”——该地区地势起伏较大，地理环境的垂直地域分异明显 ④“日愁暴雨夜愁霜”——该地区 Without facts, we can’t form a worthwhile opinion for we need to have factual knowledge _________ our thinking． [　　] A． upon which to base B． which to be based on C． which to base on D． to which to be based on