day 206聽力題目

day 206聽力題目

Day206 練習內容（TPO64-L2）

 

 

 

聽力音頻：

https://www.ximalaya.com/waiyu/43409967/361034875

 

1. What does the professor mainly discuss?

A. A weather phenomenon associated with continental polar air masses

B. A recent study comparing snowfall statistics in different regions

C. Ways in which air masses interact to create different types of precipitation

D. The formation of continental polar air masses in northern and Arctic regions

 

2. According to the professor, what is true of a continental polar air mass when it forms? Click on 2 answers.

A. Its temperature is fairly consistent

B. It has low levels of humidity.

C. It is somewhat turbulent.

D. It moves north toward cold regions.

 

 

聽力解析連結：

 

 

1 A

 

2 AB

 

 

 

聽力原文

 

 

As you know, from your reading and air mass is a large body of air that’s got uniform properties in terms of temperature and moisture.

There are four types, of air masses. And the one will concentrate on today is the continental polar air mass.

Continental polar air masses originate… form over a continent near the poles, over areas that are typically cold and dry.2 And it’s the polar air masses from the arctic in northern Canada that largely influence weather patterns in the united states, especially in the eastern… the east of the Rocky mountains.

Now, these continental polar air masses are not generally associated with heavy precipitation. In fact, since they generally remain dry and cold throughout their track across North America2, they bring the mostly clearer skies and cooler temperatures we see throughout most of the eastern united states during the winter months.

However, when a polar air mass sweeps across the great lakes region in late autumn and winter, it can bring extremely heavy snow falls to that region.

We refer to the snow storms as lake effect snows, snows whose moisture comes from the great lakes themselves.

Let me explain how this happens.

 

 

 

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