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Heat is more likely to kill an American . Sweat evaporates from the skin to cool the body. If this personal cooling system does not work right or fails to work, heat exhaustion or a heat stroke can occur.
Heat exhaustion is a warning that the body is getting too hot. With a heat stroke, body organs start to overheat. They will stop working if they get hot enough. If it is not treated, a heat stroke can result in death.

There are many ways of how heat stroke can be avoided such as do not stay in or leave anyone in a closed, parked car during hot weather and do not drink any drinks with alcohol or caffeine.

The world of American football is preparing to embrace a piece of technology that serves the most valuable of functions, saving your life. Since 2005, heatstroke has killed 33 American football players, most at high school level. An Atlanta company called Hothead Technologies has devised a helmet device that can detect when players are suffering from heatstroke.

The sensor, tucked into a helmet cushion, has a probe that presses against the wearer’s forehead in the area of the temporal artery. The readings are then sent to a PDA held by the coach or trainer via a short-range wireless link, enabling the monitoring of an athlete's temperature. It's a new device that could well be a life saver.

1)How can heat stroke occur?

-It can occur if the personal cooling does not work right or fails to work.

2)What does heat exhaustion signal?

-It is a warning that the body is getting too hot

3)List one way of how heat stroke can be avoided.

-It can be avoided if we do not stay in or leave anyone in a closed, parked car during hot weather.

-It can be avoided if we do not drink any drinks with alcohol or caffeine.

4)What is the function of the helmet device which is going to be invented by the Americans?

-It can detect whether the players are suffering from heat stroke

5)What is the worst consequence of heat stroke?

-It can lead to death

---------------不用谢-------------------- ^^