专业英语四级精选阅读50篇7
<p> <span word="Plastic">Plastic</span></p><p> <span word="We">We</span> <span word="use">use</span> <span word="plastic">plastic</span> <span word="wrap">wrap</span> <span word="to">to</span> <span word="protect">protect</span> <span word="our">our</span> <span word="foods">foods</span>. <span word="We">We</span> <span word="put">put</span> <span word="our">our</span> <span word="garbage">garbage</span> <span word="in">in</span> <span word="plastic">plastic</span> <span word="bags">bags</span> <span word="or">or</span> <span word="plastic">plastic</span> <span word="cans">cans</span>. <span word="We">We</span> <span word="sit">sit</span> <span word="on">on</span> <span word="plastic">plastic</span> <span word="chairs">chairs</span>, <span word="play">play</span> <span word="with">with</span> <span word="plastic">plastic</span> <span word="toys">toys</span>, <span word="drink">drink</span> <span word="from">from</span> <span word="plastic">plastic</span> <span word="cups">cups</span>, <span word="and">and</span> <span word="wash">wash</span> <span word="our">our</span> <span word="hair">hair</span> <span word="with">with</span> <span word="shampoo">shampoo</span> <span word="from">from</span> <span word="plastic">plastic</span> <span word="bottles">bottles</span>!</p><p> <span word="Plastic">Plastic</span> does not grow in nature. It is made by mixing certain things together. We call it a produced or manufactured material. Plastic was first made in the 1860s from plants, such as wood and cotton. That plastic was soft and burned easily.</p><p> <span word="The">The</span> <span word="first">first</span> <span word="modern">modern</span> <span word="plastics">plastics</span> <span word="were">were</span> <span word="made">made</span> <span word="in">in</span> <span word="the">the</span> 1930<span word="s">s</span>. <span word="Most">Most</span> <span word="clear">clear</span> <span word="plastic">plastic</span> <span word="starts">starts</span> <span word="out">out</span> <span word="as">as</span> <span word="thick">thick</span>, <span word="black">black</span> <span word="oil">oil</span>. <span word="That">That</span> <span word="plastic">plastic</span> <span word="coating">coating</span> <span word="inside">inside</span> <span word="a">a</span> <span word="pan">pan</span> <span word="begins">begins</span> <span word="as">as</span> <span word="natural">natural</span> <span word="gas">gas</span>.</p><p> <span word="Over">Over</span> <span word="the">the</span> <span word="years">years</span>, <span word="hundreds">hundreds</span> <span word="of">of</span> <span word="different">different</span> <span word="plastics">plastics</span> <span word="have">have</span> <span word="been">been</span> <span word="developed">developed</span>. <span word="Some">Some</span> <span word="are">are</span> <span word="hard">hard</span> <span word="and">and</span> <span word="strong">strong</span>. <span word="Some">Some</span> <span word="are">are</span> <span word="soft">soft</span> <span word="and">and</span> <span word="bendable">bendable</span>. <span word="Some">Some</span> <span word="are">are</span> <span word="clear">clear</span>. <span word="Some">Some</span> <span word="are">are</span> <span word="many">many</span>-<span word="colored">colored</span>. <span word="There">There</span> <span word="is">is</span> <span word="a">a</span> <span word="plastic">plastic</span> <span word="for">for</span> <span word="almost">almost</span> <span word="every">every</span> <span word="need">need</span>. <span word="Scientists">Scientists</span> <span word="continue">continue</span> <span word="to">to</span> <span word="experiment">experiment</span> <span word="with">with</span> <span word="plastics">plastics</span>. <span word="They">They</span> <span word="hope">hope</span> <span word="to">to</span> <span word="find">find</span> <span word="even">even</span> <span word="ways">ways</span> <span word="to">to</span> <span word="use">use</span> <span word="them">them</span>!</p><p> </p>
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