SAT官方每日一题 6月12日
<p> <span word="SAT">SAT</span>试题类型 <span word="Mathematics">Mathematics</span><span word="Standard">Standard</span> <span word="Multiple">Multiple</span> <span word="Choice">Choice</span></p><p> <span word="Read">Read</span> <span word="the">the</span> <span word="following">following</span> <span word="SAT">SAT</span> <span word="test">test</span> <span word="question">question</span> <span word="and">and</span> <span word="then">then</span> <span word="click">click</span> <span word="on">on</span> <span word="a">a</span> <span word="button">button</span> <span word="to">to</span> <span word="select">select</span> <span word="your">your</span> <span word="answer">answer</span>.</p><p> <span word="If">If</span> <span word="square">square</span> <span word="root">root</span> = <span word="square">square</span> <span word="root">root</span> , <span word="which">which</span> <span word="of">of</span> <span word="the">the</span> <span word="following">following</span> <span word="must">must</span> <span word="be">be</span> <span word="true">true</span>?</p><p> <span word="Answer">Answer</span> <span word="Choices">Choices</span></p><p> <span word="a">a</span> = 0</p><p> <span word="b">b</span> = 0</p><p> <span word="a">a</span> + <span word="b">b</span> = 0</p><p> <span word="a">a</span> <span word="minus">minus</span> <span word="b">b</span> = 0</p><p> + = 0</p><p> 答案:<span word="B">B</span></p><p> 解析:</p><p> <span word="Explanation">Explanation</span></p><p> <span word="Squaring">Squaring</span> <span word="both">both</span> <span word="sides">sides</span> <span word="of">of</span> <span word="the">the</span> <span word="equation">equation</span> <span word="square">square</span> <span word="root">root</span> = <span word="square">square</span> <span word="root">root</span> <span word="gives">gives</span> <span word="the">the</span> <span word="equation">equation</span> <span word="x">x</span> <span word="minus">minus</span> <span word="a">a</span> = <span word="x">x</span> + <span word="b">b</span>. <span word="Subtracting">Subtracting</span> <span word="x">x</span> <span word="from">from</span> <span word="both">both</span> <span word="sides">sides</span> <span word="now">now</span> <span word="gives">gives</span> <span word="negative">negative</span> <span word="a">a</span> = <span word="b">b</span>, <span word="or">or</span> <span word="a">a</span> + <span word="b">b</span> = 0</p><p> </p>
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