计算:(-7x3y)2=______.

题型:填空题

问题:

计算:(-7x3y)2=______.

考点:有理数的乘方
题型:填空题

158.93+75.62-11.475的值是 ( )

A.282.075

B.322.075

C.223.075

D.332.075

题型:填空题

阅读理解。

     Information has always been at the center of human communication. You may ask why. Well,

communication between people contains giving and receiving information. The way we give and

receive information today has experienced a revolution in the development of the mass media in

the 20th century.

    The first truly mass communication medium was the newspaper.  For the first time in history

people could read about events in their country and from around the world every day. However,

there were two problems with newspapers of that time. Firstly, newspapers were available only in

large cities, for getting newspapers to the countryside was a difficult and timeconsuming (耗时的)

task. Secondly, newspapers weren't always reliable, as there was a limited range of opinions.

     Nowadays, we can choose from a wide variety of sources to get information. Television and the

Internet have given us the chance to be informed about everything the minute it happens. Large

numbers of radio and TV stations, satellite channels and millions of websites help people keep up

with the latest news. People live in history and are part of it.

    The media have come a long way in the last century and there is no doubt that we now live in the

information age. Whatever type of media we choose, it all comes down to the need for information.

This will always be a basic need as long as communication is part of human nature.

1. Information is considered the center of human communication because ________. 

A. human communication means information exchange

B. human communication involves people's participation

C. information is now experiencing a revolution

D. information helps people gather together

2. What was the historical contribution of the newspaper as a source of information?  

A. It made the mass communication truly develop.

B. It helped the mass communication develop in cities.

C. It kept people timely informed about home and world events.

D. It kept reliable information available in big cities.

3. The third paragraph mainly tells us that technology helps ________.

A. information easily available

B. people be part of history

C. inform everything timely

D. produce the latest news

4. It can be concluded from the last paragraph that a basic need today is ________. 

A. communication            

B. information

C. high technology           

D. media types

题型:填空题

Dycal不能用于()

A.直接盖髓

B.间接盖髓

C.牙髓失活

D.诱导牙髓细胞形成牙本质

E.活髓切断后覆盖根髓断面

题型:填空题

由( )选定的分包方应经施工总承包管理方的认可,否则它难以承担对工程管理的总的责任。

A.施工方
B.业主方
C.参与方
D.开发方

题型:填空题

老年男性,72岁,因“左侧肢体无力5小时”入院。6年来多次患脑梗死入院治疗,逐渐出现智能减退、强哭强笑、言语迟缓、四肢行动迟缓无力。既往无高血压、糖尿病、冠心病史。查体:体温38.3℃,心率83次/分,呼吸20次/分,血压130/80mmHg(1mmHg=0.133kPa),意识清醒,双侧瞳孔等大,光反射存在,左侧肢体偏瘫,左侧巴宾斯基征阳性。颅脑CT示右顶后脑内血肿,量约10ml。

提示:入院后颅脑磁共振示右侧放射冠区陈旧性梗死,右顶叶皮质下多发出血灶,呈多灶性、叶性分布。该患者最有可能的诊断是()

A.转移瘤卒中

B.颅内动脉瘤

C.动脉硬化性脑出血

D.淀粉样脑血管病

E.烟雾病

F.血管网状细胞瘤

G.梗死后出血

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