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Practice 1 Extremely hot weather is common in many parts of the world. Although hot weather just makes most people feel hot, it can cause serious medical problems even death. Floods, storms, volcano eruptions and other natural disasters kill thousands of people every year. (1)______ Experts say heat may be nature’s deadliest killer. Recently, extreme heat was Named for killing more than one hundred people in India It is reported that the total heat of a hot day or several days can affect health. (2) ______ Experts say heat waves often become dangerous when the nighttime temperature does not drop much from the highest daytime temperature. This causes great stress on the human body. (3) ______ Stay out of the sun, if possible. Drink lots of cool water: Wear light colored clothing made of natural materials; avoid wearing synthetic clothing. Make sure the clothing is loose, permitting freedom of movement. And learn the danger signs of the medical problems, such as headache and vomiting, that are linked to heat. (4) ______ The pain is a warning that the body is becoming too hot. Doctors say those suffering headache or muscle pain should stop all activity and rest in a cool place and drink cool liquids. Do not return to physical activity for a few hours because more serious conditions could develop. Doctors say some people face an increased danger from heat stress. (5) ______ Hot weather also increases dangers for people who must take medicine for high blood pressure, poor blood flow, nervousness or depression.[A] Such persons have a weak or damaged heart, high blood pressure, or other problems of the blood system.[B] Several of these conditions are present at the same time.[C] Most people suffer only muscle pain as a result of heat stress.[D] Several hot days are considered a heat wave.[E] So does extreme heat.[F] Doctors say people can do many things to protect themselves from the dangers of extreme heat.[G] Heat can be both beneficial and dangerous.
关键事件技术是用以识别各种工作环境下()。
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顺产后的妇女( )。
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根据上海证券交易所2016年最新行业分类,沪市上市公司划分为( )大行业。
经过风险承受能力评估,经营机构将普通投资者按照其风险承受能力由低到高至少划分为( )五个等级。
犹太教把该墙看作是第一圣地,教徒至该墙例须哀哭,以表示对古神庙的哀悼并期待其恢复。
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聚乙烯类管道在室内不允许使用的范围是()。
聚乙烯类管道在室内不允许使用的范围是()。
聚乙烯类管道在室内不允许使用的范围是()。
聚乙烯类管道在室内不允许使用的范围是()。
聚乙烯类管道在室内不允许使用的范围是()。
聚乙烯类管道在室内不允许使用的范围是()。
聚乙烯类管道在室内不允许使用的范围是()。
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PE管敷设时,聚乙烯盘管或因施工条件限制的聚乙烯直管或钢骨架聚乙烯复合管道采用拖管法埋地敷设时,在管道拖拉过程中,沟底不应有可能损伤管道表面的石块和尖凸物,拖拉...
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