Over the past decades, sea ice________in the Arctic(北极) as a result of global wa

游客2025-03-04 20

问题 Over the past decades, sea ice________in the Arctic(北极) as a result of global warming.

选项 A、had decreased
B、will decrease
C、has been decreasing
D、is decreasing

答案 C

解析本题考查时态。根据句意，并结合常识可知冰川随全球变暖从过去几十年到现在一直在减少，所以应该用现在完成时，故选C。句意为：在过去的几十年问，北极的海洋冰川由于全球变暖而变少了。

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