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问题 单项选择题

下列关于苹果、西瓜、哈密瓜果实细胞的结构和生理功能的叙述正确的是（）

A.三者均不含中心体，所有的细胞均有叶绿体和细胞周期

B.遗传物质的载体都是染色体，无氧呼吸的产物与人的相同

C.幼嫩的种子能为果实发育提供生长素，并提供大量促进果实成熟的物质

D.三种果实的成熟果肉细胞均含大液泡，细胞液中含有一些蛋白质、糖类等有机物

答案

参考答案：D

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                                                     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, the Tarzan Suite which is large enough
for big family. You'll 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, a special 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 $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 (另外) person for only 20 extra dollars.
     For more information, visit the website: http://www.propeller-island.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 tree 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 under 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.
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问答题 简答题

什么叫金属的机械性能？常用的机械性能有哪些？各用什么试验方法测定？
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