◎ 题干
—If a="4," b="5," what’s the answer to the question “ a + 2ab +1 =?”
   —     .
A.Forty-fifthB.Forty-five
C.Twenty-threeD.One hundred and twenty-one
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—If a="4," b="5," what’s the answer to the question “ a + 2ab +1 =?”—.A.Forty-fifthB.Forty-five C.Twenty-threeD.One hundred and twenty-one…”主要考查了你对  【基数词】【序数词】【时刻】【分数】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。