异常Q波的标准通常是指（）。 A.Q波时限≥0.02s B.Q波幅度≥同导联R波的1

阅读理解。

     York has a rich and long history of more than l,900 years. Its history makes York one of the most

popular cities for visitors in England. People can hear a lot about England's history and  they see it and

walk in it. Thousands of people from different countries take a walk through l,900 years of history on

York's city walls. "York is a great city with many special buildings like old city walls. And it has

interesting shops and many fine restaurants. It's both old and modern. I really love it." said Jack Smith,

a visitor from the U S A .It's really easy to come to York. York is between London and Edinburgh, the

capital of Scotland (苏格兰). You can take a train from London to York. You can also take a bus from

London to go through Cambridge (剑桥) to York. Come and find out more about York's history!

1. York is _______ years old.

A. less than l,900    

B. about 71

C. less than 71      

D. over l ,900

2. Where is York? It's in _______.

A. Cambridge    

B. Scotland

C. England    

D. the USA

3. What did Jack Smith think of York?

A. Very interesting.    

B. Very rich.

C. Very boring.      

D. Nothing to see.

4. York has very old _______.

A. restaurants    

B. shops

C. city walls    

D. trains

5. From the passage, we know that _______ is the right map.

请读出游标卡尺的数值______mm．

相间阻抗继电器不反映接地故障

十六大以，党和国家不断加大对西藏发展的支持力度，推动了西藏的改革开放和现代化建设。加强西藏工作有利于   

①提高西藏人民的生活水平   ②巩固社会主义新型民族关系

③实现西藏人民的高度自治   ④维护民族团结、社会稳定

①②③       B. ①②④      C．②③④     D. ①③④

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