职称英语考试阅读判断试题练习
10.Inhalable Water Droplets 可吸入水滴
You think that the biggest threat to your health when taking a shower comes from slipping on a bar of soap? Well, guess again.
Preliminary studies by engineers at the University of Cincinnati and the Oak Ridge Institute for science and education, also in Cincinnati, indicate that some water-saving shower nozzles produce water droplets so small they can be inhaled, exposing anyone using the shower to several different health hazards.
Using a device called an optical particle counter the researchers tested a number of shower nozzles, both of adjustable and fix-spray styles. They found that some products create droplets less than 10 microns in diameter-small enough to be inhaled. Thats problem, the researchers theorise, because the water may contain trace of chemicals used by treatment facilities to kill microbes and bacteria in the water. These organic compounds are relatively safe to take in by drinking, but may not be safe to inhale.
Another threat may be possible as well. Previous research has shown that the droplets can contain microbes that live inside the warm, wet interior of shower nozzles. When the faucet is turn on, these microbes are swept out through the nozzles. If these droplets are inhaled, the microbes could pose a threat to people who are with asthma and other respiratory problems.
All of this doesnt mean you should skip your morning shower just yet. More research is needed, cautious oak ridge institute scientist Virendra Sethi says, before anyone can determine just how serious or insignificant these health risks may be. Moreover, not all water-conserving nozzles produce inhalable droplets. It all depends on the design of the nozzle, says Sethi. Right now there is no way for consumers to know which nozzle produce these tiny drops. We are working to develop specifications for shower head designs that would not generate droplets in the inhalable size range, he adds.
2009年职称英语真题:综合C类真题词汇选项
乐加乐少儿英语秋季高端班试卷及答案
乐加乐剑桥少儿英语等级考试模拟考试一级试卷答案
小学一年级英语听力 (广州版)一年级上 Unit 3
2011年职称英语历年真题:综合类C级真题完形填空
2011年职称英语历年真题:综合类C级真题阅读理解
独家:剑桥少儿英语一级听力练习及答案
2009年职称英语真题:综合C类真题阅读理解
2009年职称英语真题:综合C类真题补全短文
2012年职称英语考试-综合类C级阅读判断
2014年职称英语综合类C级真题及答案
一年级英语听力 (广州版)一年级上 Unit 4
剑桥少儿英语一级试题精选(2)
2012年职称英语考试-综合类C级阅读理解
剑桥少儿英语一级试题精选(3)
2012年职称英语(综合类C级)考前预测——词汇选项
2010年职称英语真题:综合类c级真题词汇选项
2009年职称英语真题:综合C类真题及答案解析汇总
剑桥少儿英语一级读写测试及答案
2010年职称英语真题:综合类c级真题答案解析
2011年职称英语历年真题:综合类C级真题答案解析
2012职称英语考试《综合类C级》考试真题答案解析
2012年职称英语考试-综合类C级概括大意
2012年职称英语考试试题综合C完型填空4
2011年职称英语历年真题:综合类C级真题及答案汇总
2012年职称英语考试-综合类C级补全短文
2013年职称英语考试《综合类C级》考试真题及答案
2012年职称英语考试试题综合C完型填空3
剑桥少儿英语一级口语测试
2009年职称英语真题:综合C类真题阅读判断
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |