CPU中用于保存当前机器运行状态的是（） A.程序计数器PC B.程序状态字PSW

What does traveling mean? Visit, enjoy and discover.

Every year hundreds and thousands of people come to the UK. And London, the capital city, is usually their first stop. What can they see? What can they experience!

Getting around in London is not difficult. There is the underground train, the oldest in the world, or the traditional double-decker bus. A boat trip along the River Thames takes you to the Tower of London.

Going around the city center on foot is easy. The maps in the streets will show you what is around you in five-minute walk. You can get a great view of the city from 135 meters up on a huge wheel, the London Eye. Look across the river and you will see the Houses of Parliament and the famous clock tower, Big Ben.

There are over 240 museums in the capital, but the two most popular are in South Kensington and cost nothing to get into. In the Natural History Museum, the key word is Big. Next to it is the Science Museum. It has those great British inventions, the history of flight and exploration (探索) of space.

小题1:For many tourists, London is their ______ stop when they are traveling in the UK.

A．first

B．second

C．third

D．lost小题2:Going around the City center on foot is easy because ______.

A．Big Ben is across the river

B．the maps in the streets will help you

C．it take only five minutes

D．you can gets great view of the city小题3:The Natural History Museum is next to ______.

A．Big Ben

B．the Tower of London

C．London Eye

D．the Science Museum

.  Three-fourths of the buildings ______.

A．was destroyed

B．is destroyed

C．were destroyed

D．has been destroyed

小儿肠套叠中最常见的类型是（）

A.结肠型

B.小肠型

C.回盲型

D.回结型

E.回回型

下列体征属于腰椎间盘突出症早期最多见的体征的是

A．Thomas征试验(+)
B．深静脉通畅试验(+)
C．交通支瓣膜功能试验(+)
D．直腿抬高试验(+)
E．巴宾斯基征(+)

声波透射法可分为如下三种检测方式：（）、（）和（）。