问题 单项选择题

高血压性脑出血的主要机制是()

A.脑内动脉外膜不发达,管壁较薄,易致破裂

B.动脉硬化内膜粗糙,形成内膜溃疡,在高血压作用下而血管破裂

C.在高血压基础上,合并脑内动静脉畸形,易出血

D.高血压可使小动脉硬化,玻璃样变,形成微动脉瘤导致破裂

E.实质上是脑内静脉循环障碍和静脉破裂

答案

参考答案:D

解析:长期高血压可使脑内小动脉硬化,玻璃样变,形成微动脉瘤,血压骤升时导致微动脉瘤破裂出血。

实验题
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News that Microsoft was making a $44.6 billion bid to buy Yahoo was greeted with heated discussion by many Internet users on Friday. Here are some responses:

Mark Galeassi of Kansas City, Missouri

This is the best move for both parties. Yahoo has the ideas and Microsoft has the money to finally market these ideas correctly. Microsoft and Yahoo are a perfect fit and the deal will be good for consumers.

Scott G of New Jersey

I was a Yahoo user for years along with Hotmail from Microsoft. Then Google came along: Google Earth, Google Toolbar and Gmail. Google is so innovative (创新的) with everything they do. Yahoo and Microsoft... same old story... I don’t think the merger (合并) will do anything for either company except improve the Yahoo shareholders’ bank accounts.

Michael Glosser of Estero, Florida

Right now, Yahoo offers a lot of features and tools at no cost for all different levels of Internet users. Microsoft seeks nothing but profit. Undoubtedly, they’ll do nothing other than find ways to start removing Yahoo’s formerly non-priced features. Microsoft’s greed will ruin the great thing that Yahoo currently is.

Toni Suarez of Hacienda Heights, California

Perhaps it would bring better high technology innovations to e-mail and help in researching and developing a better Internet!

Antonio Simmons of Parkville, Maryland

Microsoft purchasing Yahoo would be nothing more than an attempt from Microsoft to further impose upon the users their poor-quality software and obtain more wealth for the company. In my opinion, they will never be able to compete with Google because Yahoo and Microsoft’s current search engines are too inferior (差的) to compete. Even if combined, they still lack.

小题1:Who is in favor of the merger of Microsoft and Yahoo?

A.Antonio Simmons.

B.Michael Grosser.

C.Scott G.

D.Mark Galeassi.小题2:In the opinion of Scott G , _______.

A.the merger will contribute to Microsoft

B.Yahoo and Microsoft are lacking in innovation

C.Google is getting short of management experience

D.the merger will allow Microsoft to overtake Google小题3:Michael Grosser is afraid that _______.

A.the merger will cost Yahoo’s free features

B.the merger will lead to Microsoft’s defeating Yahoo

C.the increased competition will force Google out of the game

D.Internet users will have to buy Microsoft’s expensive software小题4:What is Antonio Simmons’ attitude towards Google?

A.Doubtful.

B.Disapproval.

C.Positive.

D.Negative.