系统性硬皮病的主要死亡原因是() A.中枢神经系统病变 B.胃肠道病变 C.肺部病变

题型:单项选择题

问题:

系统性硬皮病的主要死亡原因是()

A.中枢神经系统病变

B.胃肠道病变

C.肺部病变

D.心脏病变

E.营养障碍

考点:北京住院医师皮肤科Ⅰ阶段皮肤性病科皮肤性病科题库
题型:单项选择题

2008年9月25目我国成功发射了“神舟七号”飞船,关于“神舟七号”飞船的运动,下列说法中正确的是(  )

A.飞船进入圆轨道正常运行后,飞船内的航天员处于平衡状态

B.飞船进入圆轨道正常运行后,飞船内的航天员仍受到地球的引力作刚,但该引力小于航天员在地面时受到的地球对他的引力

C.返回时,飞船必须增加速度才能由圆轨道转变成返回地面的椭圆轨道

D.返回地面将要着陆时,返回舱开启反推火箭使之减速,这个阶段航天员处于超重状态

题型:单项选择题

患者男,62岁。冠心病史10年,近1周来感冒后自觉心悸,气短,夜内不能平卧,时常憋醒,偶咳嗽,白痰。查体:T36.8℃,P118次/分,R22次/分,BP135/80mmHg。口唇发绀,无颈静脉怒张,双肺底小水泡音,心律整,心率118次/分,心尖部2/6级收缩期吹风样杂音,A2亢进。肝脾不大,双下肢无水肿。辅助检查:心电图示窦性心动过速,前壁T波低平倒置。血常规WBC13.5×109/L,N88%,尿常规正常。

该患者诊断考虑为()

A.风心病,心功能不全

B.老年性心脏瓣膜病,心功能不全

C.冠心病,心功能不全

D.肺心病,心功能不全

E.高心病,心功能不全

题型:单项选择题

SECTION B (10 points )

Directions: Read the following passage. Answer the questions according to the information given in the passage and the required words limit. Write your answers on your answer sheet.

The average college student in America spent an estimated 700 dollars on textbooks last year. The National Association of College Stores reported more than five billion dollars in sales of textbooks and course materials.

Association spokesman Charles Schmidt says electronic textbooks now represent just two to three percent of sales. But he says that is expected to reach 10 to 15 percent by 2012.

Online versions are now available for many of the most popular college textbooks. E-textbooks can cost half the price of a new print textbook. But students usually lose access after the end of the term. And the books cannot be placed on more than one device, so they are not easy to share.

So what do students think of e-textbooks? Administrators at Northwest Missouri State University wanted to find out. Earlier this year they tested them with 500 students in 20 classes.

The students in the survey reported that downloading the books from the Internet was easy. They liked the idea of carrying lighter backpacks. And 56 percent said they were better able to find information.

But most found that using e-textbooks did not change their study habits. And 60 percent felt they read more when they were reading on paper. In all, almost half the students said they still liked physical textbooks better.

But the survey found that cost could be a big influence. 55 percent said they would choose e-textbooks if using them meant their textbook rental fee would not increase.

Roger Von Holzen heads the Center for Information Technology in Education at Northwest Missouri State. He tells us that administrators are disappointed with the e-textbooks now available because the majority are not interactive.

He thinks growth will come when more digital books include video, activities, games and other ways to interact with the information. The technology is improving. But for now, most of the books are just words on a screen.

81. How much do the average college student in America spend on textbooks last year? (no more than 4 words)

______________________________________________________________________________

82. What is the percentage of the e-textbook sales now according to Charles Schmidt? (no more than 4 words)

______________________________________________________________________________

83. What do students think of downloading the books from the Internet in the survey? (no more than 2 words)

______________________________________________________________________________

84. Why are administrators disappointed with the e-textbooks now available? (no more than 6 words)

______________________________________________________________________________

题型:单项选择题

Daniel is a careful driver, but he drives _______ of my friends. [ ]

A. more carefully

B. the most carefully

C. less carefully

D. the least carefully

题型:单项选择题

球阀不得用于输送含结晶和悬浮物的液体管道。

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