日常生活中的科学冷知识
<p><span word="What">What</span> <span word="are">are</span> <span word="the">the</span> <span word="most">most</span> <span word="fascinating">fascinating</span> <span word="science">science</span> <span word="facts">facts</span>?</p><p>有什么最吸引人的科学事实？</p><p>获得12.3<span word="k">k</span>好评的回答@<span word="Alyanna">Alyanna</span> <span word="Rosales">Rosales</span>：</p><p><span word="The">The</span> <span word="existence">existence</span> <span word="of">of</span> <span word="gravity">gravity</span>.</p><p>重力的存在。</p><p>1.<span word="The">The</span> <span word="reason">reason</span> <span word="why">why</span> <span word="flames">flames</span> <span word="are">are</span> <span word="going">going</span> <span word="upward">upward</span> <span word="is">is</span> <span word="that">that</span> <span word="cold">cold</span> <span word="air">air</span> <span word="sinks">sinks</span> <span word="because">because</span> <span word="of">of</span> <span word="gravity">gravity</span> <span word="which">which</span> <span word="then">then</span> <span word="results">results</span> <span word="to">to</span> <span word="hot">hot</span> <span word="air">air</span> <span word="rising">rising</span>. <span word="But">But</span> <span word="if">if</span> <span word="there">there</span> <span word="were">were</span> <span word="no">no</span> <span word="gravity">gravity</span>, <span word="flames">flames</span> <span word="would">would</span> <span word="look">look</span> <span word="like">like</span> <span word="this">this</span>:</p><p>1.火苗向上是因为受重力影响冷空气下沉，热空气上升。但如果没有重力，火苗就是这样：</p><p>2.<span word="Without">Without</span> <span word="gravity">gravity</span> <span word="bacteria">bacteria</span> <span word="gets">gets</span> <span word="tougher">tougher</span>. <span word="A">A</span> <span word="research">research</span> <span word="shows">shows</span> <span word="that">that</span> <span word="salmonella">salmonella</span> <span word="can">can</span> <span word="get">get</span> 3 <span word="times">times</span> <span word="stronger">stronger</span> <span word="in">in</span> <span word="microgravity">microgravity</span>. <span word="Good">Good</span> <span word="thing">thing</span> <span word="we">we</span> <span word="have">have</span> <span word="gravity">gravity</span>!</p><p>2.没有重力的话细菌会更难对付。一项研究显示失重状态下沙门氏菌会强大3倍，真庆幸我们有重力！</p><p>3.<span word="And">And</span> <span word="lastly">lastly</span>, <span word="Newton">Newton</span> <span word="wasn">wasn</span>'<span word="t">t</span> <span word="hit">hit</span> <span word="by">by</span> <span word="an">an</span> <span word="apple">apple</span>. <span word="He">He</span> <span word="only">only</span> <span word="saw">saw</span> <span word="an">an</span> <span word="apple">apple</span> <span word="fall">fall</span> <span word="to">to</span> <span word="the">the</span> <span word="ground">ground</span>.</p><p>3.最后，牛顿并没有被苹果砸中，他只是看见一个苹果掉在地上。</p><p>获得4.5<span word="k">k</span>好评的回答@<span word="Amandeep">Amandeep</span> <span word="Litt">Litt</span>：</p><p>1. <span word="One">One</span> <span word="eye">eye</span> <span word="blink">blink</span> <span word="needs">needs</span> <span word="movement">movement</span> <span word="of">of</span> <span word="about">about</span> 200 <span word="muscles">muscles</span></p><p>1.一个眼睛眨动需要牵动约200个肌肉</p><p>2. <span word="Every">Every</span> <span word="drop">drop</span> <span word="of">of</span> <span word="blood">blood</span> <span word="in">in</span> <span word="your">your</span> <span word="body">body</span> <span word="is">is</span> <span word="filtered">filtered</span> <span word="over">over</span> 300 <span word="times">times</span> <span word="in">in</span> <span word="a">a</span> <span word="day">day</span></p><p>2.身体里每滴血每天都要被过滤超过300次</p><p>3. 20 <span word="minutes">minutes</span> <span word="a">a</span> <span word="day">day</span> <span word="outside">outside</span> <span word="in">in</span> <span word="a">a</span> <span word="good">good</span> <span word="weather">weather</span> <span word="boosts">boosts</span> <span word="good">good</span> <span word="mood">mood</span>, <span word="broadens">broadens</span> <span word="thinking">thinking</span> <span word="and">and</span> <span word="improves">improves</span> <span word="productivity">productivity</span></p>
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