室壁瘤的最主要X线特征是（） A.左室缘局限性膨突 B.左心室增大 C.左室缘的搏动

阅读理解。

     Some people believe that schools will no longer be necessary in the near future. They say that because of the Internet and other technology,there is no longer any need for school building.classes or teachers. Perhaps this will be true one day,but if the world didn't have schools,I can't imagine(想象) how our society will be. In fact,we should learn how to use new technology to make school better.We should invent a new kind of school that is linked (连接 ) to  libraries , museums , science  centers ,labs and even companies. Technological companies should create learning programs for schools. Scientists could give talks through the Internet. TV networks and local stations could develop programs about things that students are studying in schools. Labs could be set up on websites to show new technology so students can see it on the Internet.Is this a dream? No. There are already many cities where this is beginning to happen. Here the whole city is linked to the Internet,and learning can take place at home ,at school,and in the office. Businesses provide programs for the schools and society. The schools provide computer labs for people without computers at home. Because everyone can go on the Internet,older people use it as much as younger ones,and everyone can visit faraway libraries and museums as easily as nearby ones. How will this new kind of school change the usual way of learning? It is too early to be sure,but it is very exciting to think about it.Technologv will change as well;and we will all learn something from the Internet.

1. Who thinks that students don't need to learn at school?    

A.Everyone.      

B.The writer.    

C.Some people.    

D.The teachers.  

2.What does“a new kind of school”mean in this passage? 

A.A school with few new teachers.  

B.A schoo1 with many new students.  

C.A schoo1 with many new computers.  

D.A schoo1 which is linked to the Internet.  

3.According to the text,older people______．  

A.never go on the Internet as younger ones  

B.go on the Internet as often as younger ones  

C.go to the computer lab to study new things  

D.are afraid of the internet and other technology

4.What the writer thinks is that____.  

A.schools are still necessary  

B.more schools should be built  

C.there should be fewer schools  

D.more computers are needed in schools

下列溶液加热蒸干后，能析出溶质固体的是（   ）

A．AlCl₃

B．NH₄HCO₃

C．KHCO₃

D．Fe₂ (SO₄) ₃

天津开埠之初，海关总税务司的评估是“在中国，除去上海或许还有广州，没有任何一个口岸像天津这样有着同内地如此良好的水陆交通”。这表明天津（  ）

A．因接近北京而备受重视

B．作为首批通商口岸地位重要

C．利于出口，增加海关收入

D．有着潜在的广阔的市场

严禁约时_____或_____重合闸。

试用马克思主义政治经济学中的货币流通规律原理阐述社会主义自觉调节货币流通的意义。