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问题 单项选择题

金属烤瓷冠的唇侧一般为

A．刃状边缘
B．凿状边缘
C．凹形边缘
D．肩台形边缘
E．带斜面凹形边缘

答案

参考答案：D

解析：金属烤瓷冠的唇侧既有金属又有釉瓷，为了给瓷层留出足够的空间一般选择 1.0mm的肩台形边缘。

完形填空

Probably you have seen someone reading a book on an electronic reading device. Over the past few years, these small computers have become more popular. For that reason, more companies that make   小题1:  paper books are now making electronic books (e-books). Most e-books are the same as paper books,   小题2:  people download a file into a reading device rather than   小题3:  the paper book. This way they can   小题4:  many books.

Books companies are adding special features   小题5:  some e-books. These extra features might include sound files, picture files, or video files. When the readers click on these files they learn more about the book, the story, or the writer.

The latest electronic readers are smaller and   小题6: , but they are also much more powerful. They can store much more information, so writers and book companies can do more with   小题7:  e-books. They do not want to just add files to   小题8:  completed book. They are making the sound, picture, and video files part of the story. Readers need these files to understand the whole story. Readers can   小题9:  change the story.

Readers already have a lot of books to   小题10:  from. If they can change the way stories end, they will have more choices!
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单项选择题

女性，65岁，间断咳喘20多年，1月来加重伴水肿。查体：端坐位，发绀，两肺可闻干湿性啰音，双下肢水肿。经抗感染、利尿等治疗后病情好转。但2天后神志不清，手足搐搦。血气分析pH7.50，Pao270mmHg，PaCO260mmHg，HC0-343mmol／LoK+3.0mmol／L，Na+132mmol／L，Cl-70mmol／L。该患者的酸碱失衡类型为（）

A.代谢性碱中毒，失代偿

B.呼吸性碱中毒，失代偿

C.呼吸性酸中毒十代谢性碱中毒

D.代谢性碱中毒，代偿

E.呼吸性碱中毒十代谢性碱中毒
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