如右图所示，能表示人体骨骼肌细胞内ATP含量与氧供给之间关系的曲线是（） A.a B

There are many special hotels around the world. In Greenland, there is a hotel made out of ice. In Turkey, there is a cave hotel. And in Bolivia, there is the Salt Palace Hotel.

Thousands of years ago, the area around the Salt Palace Hotel was a large lake. But over time, all the water disappeared. Today, the area has only two small lakes and two salt deserts.

In the early 1990s, a man named Juan Quesada built the hotel. He cut big blocks of salt from the desert and used the blocks to build it. Everything in the hotel is made out of salt: the walls, the roof, the tables, the chairs and the beds.

The sun heats the walls and roof during the day. So the rooms stay warm at night, though it’s cold outside in the desert. The hotel has twelve rooms. A single room costs $40 a night, and a double room $60.

A sign on the hotel’s wall tells guests, “Please don’t lick (舔) the walls.”

小题1:Where did the salt for the hotel come from?

A．A cave.

B．The lake.

C．The salt desert.

D．A salt field.小题2:What keeps the rooms in the Salt Palace Hotel warm at night?

A．The water in the lake.

B．The sand in the desert.

C．The furniture in the rooms.

D．The heat from the walls and roof.小题3:What is the passage mainly about?

A．A large lake.

B．A special hotel.

C．A beautiful wall.

D．A famous desert.

2010年中国GDP总量超越日本，成为全球第______大经济体，这一伟大成就说明______。[ ]

A．一  我国已经实现共同富裕      

B．一  社会主义制度具有优越性

C．二  我国已经实现共同富裕      

D．二  社会主义制度具有优越性

产生显影斑痕的原因是什么？（）

A、显影液浓度不均匀，胶片上部分药膜显影过度

B、显影温度不稳定，波动过大

C、显影液氧化失效

D、显影时搅拌不均匀

E、以上都是

按照各个组成部分的连接情况不同，曲轴可分为（）曲轴和组合式曲轴两类。