态度亲和能使我们增添交往的魅力，是文明礼貌的重要内容。[ ]
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A rectangular circuit board is designed to have width叫inches, perimeter p inches, and area k square inches. Which of the following equations must be true ？（）
A．ω2+pω+k=0
B．ω2-pw4+2k=0
C．2ω+pw+2k=0
D．2ω-pω-2k=0
E．22ω-pw+2k=0
以下用于自优化配置的工具是（）
A.LMT
B.SON
C.CDL
D.快配
