根据生产需求，碳化塔内所进中段气浓度的理论值为（）。A、45% B、90% C、40

青年男性，右臂中段被机器绞伤2小时，右上臂后侧有宽3cm的皮肤相连，其余组织完全离断。

最合适的治疗方案为（）。

A.清创+右肱骨内固定术

B.清创+右肱骨内固定+血管损伤修复

C.清创+右肱骨内固定+神经损伤修复

D.断肢再植

E.清创+残端缝合术

The chairman thought ________ necessary to invite Professor Smith to speak at the meeting.

A．that

B．this

C．it

D．him

阅读理解。

                                                       Coolest Hotels in the World

Ariau Amazon Towers

     The Ariau Amazon Towers hotel lets you sleep in a tree house. Eight towers make up this hotel that offers

over 300 rooms. If you really want to get into the spirit, book the Tarzan suit which is large enough for a big

family. You'll be thirty feet up in the air and can travel between the towers through their wooden walkways.

     Prices, starting at $300 one night for each person for a regular room and going all the way up to $3000

for the Tarzan Suite.

     For more information, visit the website: http://www.ariautowers.com

The Ice Hotel

     Every winter in Jukkasjarvi, Sweden kind of hotel called the Ice Hotel is built Each year, world-famous

artists are invited to design and produce works of art from the ice, many of which can be found in the rooms.

You'll have your choice between hot or cold rooms, but you will be well advised to stay at least one night in a

cold room for a true experience.

     Prices: starting at $318 one night for each person for either a cold room or a warm one.

     For more information, visit the website: http://www.icehotel.com

Propeller Island

     Propeller Island City Lodge is a very special hotel that was designed by a German artist. Each room provides

you with the possibility of living in a work of art. Every single piece of furniture in the thirty rooms of the hotel

has been hand-made and each room is completely different. You'll be able to choose a room based on your own

personal tastes.

     Prices: starting at just $91 a night and an additional person for only 20 extra dollars.

     For more information, visit the website: http://www.propellerisland.com

For information about other cool hotels in the world, visit the website:

http://www.bahamabeachclub.com

1. What is special about the Ariau Amazon Towers hotel?

A. You can sleep in the houses

B. You can choose any of the towers

C. It is designed for big families

D. Every room has a walkway

2. For two persons spending a night in one of these hotels, they have to pay at least _____.

A. $111

B. $182

C. $600

D. $636

3. Which website should you visit if you want to find out whether there exists a hotel the sea?

A. http://www.icehotel.com

B. http://www.ariautowers.com

C. http://www.propeller-island.com

D. http://www.bahamabeachclub.com

4. Which hotel would invite artists to come to work every year?

A. Propeller Island City Lodge

B. Ariau Amazon Towers

C. The Ice Hotel

D. Bahama Beach Club

温哥华是加拿大西部农、林、矿产品的主要集散中心。天然良港，冬季不冻，外港英吉利湾开阔，内港巴拉德湾口窄内宽，由西向东延伸32km，建于菲沙河北侧支流河口岛屿上的国际机场，为加拿大重要航空中心之一。结合下图回答下列问题。 

（1）图中温哥华冬季气温比同纬度其他地区较高，请说明原因。

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（2）影响图中铁路线走向的最主要因素是什么？评价温哥华交通运输状况。

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（3）图中L河上游在加拿大和美国都蕴藏有丰富的水能资源，分析两国在开发方面的差异，并说明在开发过程中应注意的问题。

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如果基本价格是确定的，运输费用是后来加上的，这叫做（）。

A．可变送货价格

B．到货价

C．自提价

D．其他价格