若y2+4y-4=0，则3y2+12y-5的值为______．_爱下问搜题

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问题填空题

若y²+4y-4=0，则3y²+12y-5的值为______．

答案

由y²+4y-4=0得，y²+4y=4，所以3y²+12y-5=3（y²+4y）-5=3×4-5=7．

完形填空

A first-grade student whose best friend is battling cancer thought that hours of playing and telling jokes was not enough - he wanted to show his buddy just how he understood the        time he was going through.
Seven-year-old Vincent Butterfield        the only way was to cut off his hair in support of his best friend Zac who lost his hair through chemotherapy(化疗).
Zac Gossage is receiving treatment but        goes to Union Central Elementary School in Missouri every day,        that's where he gets to play on the swing with Vincent. Vincent found out that Zac might        his hair because of the chemotherapy treatment. So one day, he showed up in the first grade class wearing a       . He said to his teacher Mrs. Koester, "I have a surprise for Zac." And he pulled off his cap and other        saw that he already had all his hair       off.
"I did it just to make Zac feel he's not the only one without any      ." said Vincent.Vincent has also been raising money for his best friend after learning how        his chemotherapy treatments are. He asked his mother to make        than 20 scarves and gloves. He and his mother        them at the price of 10 dollars each, raising over $200 for Zac. The encouragement from Vincent seems to be working. Though Zac is receiving treatments, he has        missed any days of school. He knows that Vincent is out on the playground, waiting for him at break.
When asked        friendship was, Vincent looked at his friend Zac, thought for a(an)        and responded,"It's a beautiful thing."
Clearly, wisdom doesn't always come with age.

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