20.The rise in carbon dioxide is causing a steady. (constant,unchanging) rise in temperature.

分析 二氧化碳的上升導致了氣溫的穩(wěn)定上升.

解答 答案:steady.
根據(jù)括號中的提示constant,unchanging可知,這里強調(diào)的是連續(xù)的、不變的,穩(wěn)定的;所以用steady來表示;故答案為steady.
另如Despite the steady progress of building work,the campaign against it is still going strong  
盡管建筑施工已在穩(wěn)步進行,但反對活動仍然高漲.

點評 首字母填空題考查的是詞匯的記憶和運用能力,平時要注意積累和運用.同時還要注意提示字母.

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