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A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week according to the National Weather Service.

According to the NWS a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.

Temperatures across the Midwest will drop into the 60s and 70s-a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and Washington

The cool breezes may be a welcome relief this time around but remember the last few times we got hit with Arctic air？

Temperatures in cities including Chicago Cleveland New York and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we’re sure you remember

According to the National Weather Service____

A.the cool mass of air originates from Canada
B.a mass of cold air will affect both Canada and the U.S
C.the chilly weather is back to the globe
D.only the upper Midwest will be affected by the cool air

正确答案及解析

正确答案

解析

细节题。根据文段提到的“A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week according to the National Weather Service”。我们从这句当中可以知道，在加拿大和阿拉斯加地区形成的冷空气大规模的向美国行进。可知A项符合。B项指的冷空气会同时影响加拿大和美国。C项寒流天气会重来。D项仅仅是海拔较高的中部地区会受寒潮的影响。BCD项均不符文意。因此答案选A。