磁铁有哪些特性？

骨折是由于外力的作用破坏了骨的（）或（）。

A.活动性

B.坚固性

C.完整性

D.连续性

E.弹性

4个月女婴，生后牛奶喂养，未添加辅食，突然惊厥发作，双眼上翻，面部肌肉颤动，四肢抖动，约持续1min自行缓解，无发热，不呕吐，查体：神清，精神好，面色稍苍白，心肺正常，前囟平坦，颈软，无抵抗，枕部有乒乓球感。该患儿最可能的诊断是

A．佝偻病手足搐搦症

B．癫痫

C．脑炎

D．颅内出血

E．高热惊厥

选做题：根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

                                                           Linguistic (语言学的) Puzzles

     How did language begin? What was the world's first language? Do all languages come from one, original

language? 1_____.

     In the 4th century BC, the Creek historian Herodotus wrote this account: Psamtik I an Egyptian King,

wanted to find out what the oldest language in the world was. 2_____. He told his servant to find two newborn

babies. When the servant had found them, the king gave them to a shepherd (牧羊人) and said, "Keep these

babies with the goats. Take care of them, but do not talk to them. Listen for any words that they say." The king

wanted to find out what 1anguage the children would speak if they were left alone. He said, "The first words

they speak will come from the original language of the world." 

     3_____. He told the king, who asked his scholars about this word. They told him that the Phiygians, who

lived in an area which is now Turkey, called bread "becos." The king said, "Then Phiygian is the oldest

language."Today we know that the king's conclusion was wrong. We don't know why the children said "becos".

     4_____. Scholars discovered that many European and southern Asian languages belonged to the same"family"

and that they star- ted from the same parent language, Proto-Indo-European. Linguists think that it had split into

several different languages, including Greek and Sanskrit, between 2,000 and 1,000 BC. Other languages, such

as English and Spanish, developed from later splits.

     5_____. Two questions that interest linguists are: How does language change? Why does language. change?

If you like solving mysteries, historical linguistics may be the job for you.

A. Nowadays, we study the origin of language more scientifically

B. He was talking about this problem with his scholars when he had an idea

C. The king was very kind to his servant and his servant remained royal to him

D. Linguists are the scholars who are very interested in categorizing the language families

E. People have been trying to find the answers to these questions for more than 2,000 years

F. One day, while the babies were babbling to each other, the shepherd heard them say "becos"

G. Linguists have classified many language families, and they are still trying to categorize others

异位ACTH综合征较常见的水电解质及酸碱平衡紊乱是()

A．稀释性低钠血症伴代谢性碱中毒

B．低血钾性碱中毒

C．高血钾性碱中毒

D．低血钾性酸中毒

E．高血钠性碱中毒

毛石墙砌成夹心墙的原因是 ___ 。

A．末按规定设置拉结石

B．夹缝中垫碎石过多

C．墙体厚度过大显得毛石形体过小

D．竖向灰缝过大