单选题
As El Nino builds, ______.
A、
the normal westward trade winds weaken
B、
the normal eastward trade winds weaken
C、
the normal westward trade winds strengthen
D、
the normal eastward trade winds strengthen
【正确答案】
A
【答案解析】
第一段说As El Nino builds the normal east-to-west trade winds wane，wane减弱，衰退，选项A表述与之符合。
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