游艺机操作人员在游客游乐前应（），操纵方法及有关注意事项。A、介绍设施对身体状况要求

阅读理解。

     Newton (牛顿) was a great scientist. He thought only about his work. One day he was hungry. He wanted

to have an egg. Then he took out an egg from the box. He wanted to boil (煮) the egg for three minutes. But he

was thinking about a problem (问题). So he put his watch into the hot water. He stood there and waited. When

the servant (佣人) came in , she saw Newton was boiling his watch, but the egg was in his hand.

1. Did Newton think only about his work? [ ]

A. Yes, he did.

B. No, he didn't.

C. No, he did.

D. Yes, he didn't.

2. Why did he want to boil an egg one day?[ ]

A. He liked to eat eggs.

B. He was hungry.

C. The servant wanted to eat the egg.

D. He wanted to sell it.

3. Where did he take out the egg from?[ ]

A. From the bag.

B. From the desk.

C. From the room.

D. From the box.

4. How long did he want to boil an egg? [ ]

A. 40 minutes.

B. 4 minutes.

C. 3 minutes.

D. 30 minutes

5. What did he think about when he put his watch into the hot water? [ ]

A. He was thinking about his watch.

B. He was thinking about a problem.

C. He was thinking about the egg.

D. He was thinking about the servant.

2012年1月，日本许多地区普降特大暴雪。读图，完成1—2题。

1．对日本暴雪空间分布形成无关的因素是 [     ]

A．地形因素

B．位于板块交界处

C．西北季风

D．日本海提供充足水汽

2．图中的虚线为某水平自然带分布的最北界线，与该自然带在我国分布的最北界线相比，图示界线 [     ]

A．纬度较高，主要原因是该地受海洋和暖流影响大

B．纬度较高，主要原因是该地不受西北季风影响

C．纬度较低，主要原因是该地多山地丘陵地形

D．纬度较低，主要原因是该地受寒流影响大

全胃肠外营养支持患者可能发生的最严重的代谢并发症是（）。

A.高钾血症

B.低钾血症

C.高血糖

D.高渗性非酮性昏迷

E.肝功能异常

解释VPN的基本概念。

浴盆式敞车车体下部设计成浴盆型结构，一方面充分利用了机车车辆下部限界，另一方面也有效地解决了增加载重与降低车辆（）的矛盾。

A.重心

B.重力

C.重载

D.重量