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  3. E1 Nino is the name given to the mysterious and often unpredictable change i

E1 Nino is the name given to the mysterious and often unpredictable change i

游客2023-07-17  19
问题     E1 Nino is the name given to the mysterious and often unpredictable change in the climate of the world. This strange【S1】______happens every five to eight years. It starts in the Pacific Ocean and is thought to be caused by a failure in the trade winds(信风), which affects the ocean currents driven by these winds. As the trade winds lessen in【S2】______, the ocean temperatures rise, causing the Peru current flowing in from the east to warm up by as much as 5℃.
    The warming of the ocean has far-reaching effects. The hot, humid(潮湿的)air over the ocean causes severe【S3】______thunderstorms. The rainfall is increased across South America,【S4】______floods to Peru. In the West Pacific, there are droughts affecting Australia and Indonesia. So while some parts of the world prepare for heavy rains and floods, other parts face drought, poor crops and【S5】______.
    EI Nino usually lasts for about 18 months. The 1982-83 EI Nino brought the most【S6】______weather in modern history. Its effect was worldwide and it left more than 2,000 people dead and caused over eight billion pounds【S7】______of damage. The 1990 E1 Nino lasted until June 1995. Scientists【S8】______this to be the longest El Nino for 2,000 years.
    Nowadays, weather experts are able to forecast when an El Nino will【S9】______, but they are still not【S10】______sure what leads to it or what affects how strong it will be.

      A)estimate                  F)phenomenon                K)starvation
      B)strength                  G)stable                    L)bringing
      C)deliberately              H)attraction                M)exhaustion
      D)notify                    I)completely                N)worth
      E)tropical                  J)destructive               O)strike [br] 【S1】
选项
答案 F
解析 根据语法，此处应填入一名词作“happens”的主语。候选项中的名词有B)、F)、H)、K)和M)，再依据该主语中指示词“this”，即首句内容，这里F)“现象”符合语境。
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