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3.C【解析】本题主要考查化学用语，侧重考查学生对基础知识的理解能力。Mg+的原子结构示意图为+12)28,A项错误；Mg(OH)2的电子式为[H:O:]Mg2+[:O:H]-,B项错误；中子数为9的氧原子可表示为8O,D项错误。
The International Painting Contest on Google’s homepage in 2015 may look pretty strange，but it spotlightings a very serious issue：clean water, which is unusual for an 11-year-old from Long Island．
Audrey Zhang，a fifth-grader from Levittown，N．Y，is the winner of this year’s Doodle 4 Google contest，rising to the top of some 100，000 entries on the theme of“draw one thing to make the world a better place．”
Her piece，titled“Back to Mother Nature，”describes a detailed water-cleaning machine．Zhang worked with a team of artists at Google to animate(使……生动)her drawing．
“To make the world a better place，I came up with a transformative water purifier, a machine used to remove dirty or harmful substances，”Google quoted Zhang as saying．“It takes in dirty and polluted water from rivers，lakes and even oceans，then massively transforms the water into clean，safe and pure water. When humans and animals drink this water, they will live a healthier life．”
She created a whole world around the device—one populated by humans， a whale in a top hat and dragons．
Zhang，s piece is“so vivid and so rich and so full and so complete，’’Google Doodle team leader Ryan Germick told the Washington Post．“Every leaf seemed to have life in it．”
Along with having her artwork featured on Google’s homepage，Zhang wins a $30，000 college scholarship．In addition，her school will receive a $50，000 Google for Education technology grant，and the company is donating $20，000 in her name to a charity devoted to bringing clean water to schools in Bangladesh．
On Sunday, the night before her work was revealed on net，Zhang told Newsday she was excited by the big win，but said she wouldn’t be awake when her art first went online at midnight．
“I have school-tomorrow, so I can’t stay up late，”she told the paper．
1.What’s the passage mainly about?
A．The winner and her work in the painting contest．
B．The team of artists at Google to animate drawings．
C．The painting contest of Google’s homepage in 2015．
D．The water-cleaning machine in the painting contest．
2.According to the passage，we know that______．
A．Audrey Zhang is creative and self-disciplined
B．a water-cleaning device was made in the contest
C．$50，000 will be donated in Audrey Zhang’s name
D．Zhang’s piece was printed in all major newspapers
3.The underlined word in Paragraph l probably means“_____”．
A．put up with B．1ook for ward to
C．breakaway from D．focus attention on
试题答案
1.A
2.A
3.D
【解析】
试题分析：文章主要讲了一个小女孩的作品获得了谷歌主页绘画比赛的冠军。
1.
2.Audrey Zhang是一个很有创造力的小女孩，根据最后一段她从不熬夜可知她是一个很自律的人。故选A。
3.
考点：考查社会现象类短文阅读
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