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鳞式

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题型：名词解释

题目：

鳞式

答案：

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题型：填空题

（1）原子数相同、核外电子总数也相同的粒子（分子或离子）互称为等电子体，等电子体往往具有相同的结构和相似的性质，写出下列各粒子的等电子体：CH4          、NO3-          。

（2）金属和碳形成的化合物都可以看作离子化合物，可以与水发生复分解反应生成相应的金属氢氧化物和碳氢化合物。如CaC2+2H2O=Ca(OH)2+C2H2↑。试写出下列金属碳化物与水反应生成的碳氢化合物的化学式：ZnC2          、Zn2C3         。
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题型：阅读理解

阅读理解。

     One of the main decisions you must make when traveling is deciding where to stay. A good place to

stay can often make a holiday. Whether you are looking for a classy hotel or a night under the stars, we

can guide you through your different options.

     Bed and Breakfast

     An English invention, bed and breakfasts offer exactly what they suggest, a bed for the night and

breakfast in the morning. People who hate the anonymity of hotels but want more luxury than a hostel

often choose to stay at bed and breakfasts. "B&B's", usually someone's private home, are often found

in the countryside.

     Hostels

     For those traveling on a tight budget, hostels are the best accommodation option. Informal places

usually with a friendly youthful vibe(氛围), they offer dormitory beds for rent. Bathrooms are usually

down the hall.

     Remember to check reviews by previous guests online before you book your hostel.

     Couch Surfing

     An unusual but interesting option, couch surfing is a growing trend among young internationals. The

idea is that you become a member of the online couch-surfing community (www. couchsurfing. com)

and then when you travel, look up other members in that country and ask to stay on their couch (沙发).

Most hosts will suggest sightseeing trips and take you out in the evening, making it a great way to see

things that aren't in your guidebook. And remember, it may be free but don't forget to offer to buy your

host a drink or dinner.

     Camping

     Sleeping under the stars! For budget travelers staying at camping grounds is the cheapest way to

travel. The drawback is that you have to carry a tent with you. Camping grounds can be found across

Europe, America and Australia. However, if you intend on camping in busy cities, check first where the

nearest campsite is. More often than not, they are on the outskirts, which can mean lengthy bus rides into

town when you want to eat or see the sights.

1. Hostels are popular among budget travelers because they provide  _____.

A. a friendly atmosphere   

B. dormitory beds for sale

C. reviews by previous guests  

D. beds and bathrooms as well

2. The advantage of couch surfing is that  _____.

  

A. you don't have to pay any money

B. you can have a couch to sleep on

C. you can explore the nightlife there

D. the host will charge you for sightseeing

3. The disadvantage of camping is that you have to ______.  

A. sleep in the open air

B. take some extra articles

C. camp near big cities for safety

D. take a long distance bus to the campsites

4. You want a better but not too expensive place to stay, you may choose _____.  

A. Bed and Breakfast    

B. Hostels    

C. Couch Surfing  

D. Camping
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