2015年10月22日SAT官方每日一題

2015/10/22 瀏覽次數:2 收藏
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  標題範例:Mathematics > Standard Multiple Choice

  Read the following SAT test question and then click on a button to select your answer.

  If (x+y)²=x²+y², which of the following statements must also be true?

  I.x=0

  II.(x-y)²=x²+y²

  III.xy=0

  (A) None

  (B)I only

  (C)II only

  (D)III only

  (E)II and III

  謎底:E

  【剖析】