问题 问答题 简答题

越岭隧道选址应考虑的因素?

答案

参考答案:

①优先考虑在路线总方向上低垭口,其展线好隧道较短。

②具有良好展线条件的沟谷且不损失越岭条件的垭口。

③分水岭两边沟谷高程相差不多且两边沟谷平面位置接近。

④工程地质和水文地质条件良好。

⑤施工难易度,运营条件等。

阅读理解

阅读理解

     Canada 4:00 a.m. to 8:00 a.m.

     Canada is a big country with six time zones. In the west, it is four a.m., and everyone is asleep, but in

Halifax on the east coast it is eight o'clock and people are having breakfast. It is a cold Friday morning in November, and the temperature is ten degrees below zero Centigrade.

     Argentina 9:00 a.m.

     In Buenos Aires, the capital of Argentina, it is nine a.m. on a warm summer morning, and people are

starting work or school. November is a summer month in Argentina because it is in the southern

hemisphere(南半球).

     Scotland 12:00 noon

     Scotland is part of the United Kingdom. The capital of Scotland is Edinburgh, and the capital of the UK is London. It is twelve noon, or midday, in Edinburgh. Children are having lessons, but they are looking

forward to the weekend because there is no school on Saturday and Sunday.

     Egypt 2:00 p.m.

     Friday is already the weekend in Egypt. Friday is a special day for Muslims, so schools, offices and

shops are closed in all Arab countries. So now, at two p.m., most people in Egypt are having lunch with

their families.

     Japan 9:00 p.m.

     Japan is seven hours ahead of Egypt, so it is already Friday evening there. The weekend is beginning. Most people are out with friends or watching television or playing computer games.

     New Zealand 12:00 midnight

     It is late on Friday night, so most people are asleep. Now Saturday morning is arriving. It is morning in Canada too, but that is Friday morning!

1. In eastern Canada, the time is _____ that in western Canada.

A. four and a half hours behind      

B. four hours ahead of

C. three hours ahead of            

D. the same as

2. While Canadian children in Halifax are having breakfast, Argentinean children are _____.

A. sleeping        

B. going home      

C. at school      

D. having supper

3. It's midday in the capital of _____ when it's 9:00 a.m. in the capital of Argentina.

A. Japan          

B. Canada        

C. New Zealand    

D. Scotland

4. Two p.m. in Egypt is not a good time to telephone people in New Zealand, because in New

Zealand _____.

A. it's midnight and most people are asleep  

B. it's noon and many people are having lunch

C. it's the morning and many people are working

D. it's the afternoon and most people are playing computer games

5. What time is it in New Zealand if it's 11:15 p.m. in Japan?

A. 1:15 p.m.      

B. 2:15 p.m.      

C. 1:15 a.m.        

D. 2:15 a.m.

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