热茶和冷饮，哪个更解暑？

While you might be tempted to reach for a cold drink to help cool you down in such hot weather, surprisingly hot drinks such as tea and coffee may actually be more effective. A study in 2012 by researchers from the University of Ottawa looked at the effect of drinking hot drinks on body temperature. The results revealed that a hot drink can cool you down, but only in dry conditions.

Essentially, when you ingest a hot drink, you start sweating more. If the sweat is able to evaporate, it actually cools you down, more than compensating for the added heat to the body from the fluid. While sweating can be embarrassing, it’s an essential body function to help keep us cool. As the sweat evaporates from the surface of your skin, it removes excess heat by converting the water from a liquid to a vapour. However, in humid conditions this cooling effect is less effective, so drinking hot drinks won’t help to cool you down.

Dr Jay explained, “On a very hot and humid day, if you’re wearing a lot of clothing, or if you’re having so much sweat that it starts to drip on the ground and doesn’t evaporate from the skin’s surface, then drinking a hot drink is a bad thing. The hot drink still does add a little heat to the body, so if the sweat’s not going to assist in evaporation, go for a cold drink.”

Overall, the lesson learned is that in hot, dry conditions, drinking hot drinks will cool you down, but if you’re in a humid location, it’s best to stick to cold beverages.

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1.Which of the following statements is NOT true according to the passage?

A Essentially, as long as you ingest a hot drink, you start sweating more.

B Drinking a cold drink is not always a good thing.

C Hot and cold drinks should be selected according to the weather.

D Cold drinks are more effective than hot drinks to help cool us down.

解析：选D。细节理解题。根据第一段While you might be tempted to reach for a cold drink to help cool you down in such hot weather, surprisingly hot drinks such as tea and coffee may actually be more effective. 可知选项D错误，故选D。

2.What is the benefit of sweating according to the passage?

A Sweating can be embarrassing.

B Sweating makes people smelly.

C Sweating makes people feel refreshed.

D Sweating can adjust our body temperature.

解析：选D。细节理解题。根据第二段While sweating can be embarrassing, it’s an essential body function to help keep us cool. 可知尽管流汗令人尴尬，但却是人体的一项重要功能，有助于保持凉爽。选项A不是功能，B和C文章未提及，故选D。

3.What’s the Chinese meaning of the underlined word “evaporate” in Paragraph 2?

A 吸收.

B 蒸发.

C 代谢.

D 堵塞.

解析：选B。词义猜测题。根据第二段As the sweat evaporates from the surface of your skin, it removes excess heat by converting the water from a liquid to a vapour. 可知当汗水从皮肤表面蒸发时，会在水转化为蒸汽的过程中带走多余的热量。由此原理倒推第二段可知，词义为“蒸发”最合适，故选B。

4.On hot and dry days, what kind of drink do you need to cool you down?

A Hot milk.

B Coffee with ice.

C Cold water.

D Watermelon.

解析：选A。推理判断题。根据最后一段Overall, the lesson learned is that in hot, dry conditions, drinking hot drinks will cool you down, but if you’re in a humid location, it’s best to stick to cold beverages.可知在炎热干燥的天气里，喝热饮会让你感觉凉爽，但如果天气潮湿，最好还是喝冷饮，故选A。

5.What is the passage mainly about?

A The benefits of sweating in hot weathers.

B The relationship between sweating and body temperature.

C Cold drinks or hot drinks to cool us down in summer.

D Drinking hot drinks is a bad thing in summer.

解析：选C。主旨大意题。根据全文可知，本文主要讨论了在炎炎夏日到底选择热饮还是冷饮会更加消暑以及相应的原理，故选C。