最近巴西设计师将3D打印技术与医用B超相结合，给准妈妈腹中胎儿_爱下问搜题

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问题填空题

最近巴西设计师将3D打印技术与医用B超相结合，给准妈妈腹中胎儿打印了1：1的3D模型（如图），作为孩子成长的记录，请问B超利用的是______（选填“声波”或“电磁波”），这种波______在真空中传播．

答案

B超利用超声波来传递信息，它不能在真空中传播，电磁波可以在真空中传播．

故答案为：声波；不能．

选择题

2011年10月9日，《国务院关于支持河南加快建设中原经济区的指导意见》对外正式颁布，在全国范围内引起了广泛关注和强烈反响。这一意见的实施有利于

①统筹城乡发展 ②推动区域协调发展 ③实现共同富裕的目标 ④全面建设小康社会

A．①②③

B．①②④

C．②③④

D．①③④

完形填空

The heaviest snow in a hundred years hit the south of China. It snowed __36___for half a month. Many people were __37___in railway stations, bus stations and airports. People did everything they could to fight the __38___; nobody was killed from cold and _39____. Gradually ,the trapped people all went back home_40___. While fighting the snow, people ___41__their animal friends until a moving story of a swallow(燕子) couple appeared on the Internet.
The couple hadn’t eaten anything for several days __42___the snow. They tried to fly into people’s home to warm themselves, but every house was ___43___tightly(紧紧地). They got to a side of a balcony ( 阳台 ) where wind couldn’t reach. They jumped and flapped (拍打) their wings(翅膀) to _44___the attention of the people inside the house, who were __45____their own things. The wife’s body was __46___. She couldn’t move any longer. The husband came near and __47__her with his wings. The husband lost his heat soon because of his opened wings.
The next morning, the housemaster went to the balcony to __48__ his flowers and saw a dead swallow outside. __49__ it, he found they were two embracing（拥抱） together. Thinking of the __50___the snow had brought to people, he was moved to tears . He took them in for giving them some _51___they couldn’t feel any longer. He found a small box, __52__it with some hay （干草）and lay the couple in . He _53__them in the garden of the community(社区).
In my hometown in the countryside, a swallow family live in the roof of my house . They __54__every spring to have babies. Then in autumn, when babies have __55___, they fly to the south, I wonder if they will come back this spring as they did.

A．beautifully

D．continuously

C．in spite of

C．, stretched

C．cooperation

A．dropped out