美国历史学家杰里•本特利指出：当1945年同盟国击败轴心国，摧毁德意志帝国和日本

最可能的原因是

A．备洞时刺激牙髓

B．充填时未垫底

C．流电作用

D．充填体恳突

E．充填体高点

阅读理解

     In 1982 Steven Callahan was crossing the Atlantic alone in his sailboat when it struck something and

sank. He was out of the shipping lanes and floating in a life raft, alone. His supplies were few. His chances were small. Yet when three fishermen found him seventy-six days later, he was alive.

     His account of how he survived is fascinating. But the thing that caught my eye was how he managed

to keep himself going when all hope seemed lost. Giving up would have seemed the only wise option.

     When people survive these kinds of circumstances, they do something with their minds that gives them

the courage to keep going. Many people in similarly desperate circumstances give in or go mad.

     "I tell myself I can handle it," wrote Callahan. "Compared to what others have been through, I'm

fortunate. I tell myself these things over and over, building up fortitude(坚强意志)…."

     It struck me as something important. And I've told myself the same thing when my own goals seemed

far off or when my problems seemed too overwhelming. And every time I've said it, I have always come

back to my senses.

      The truth is, our circumstances are only bad compared to something better. But others have been

through much worse. So here, coming to us from the extreme edge of survival, are words that can give us

strength. Whatever you're going through, tell yourself you can handle it. Tell this to yourself over and over, and it will help you get through the rough spots with a little more fortitude.

1. The writer seemed more interested in ______.

A. something that made Steven Callahan want to cross the Atlantic

B. What made Steven Callahan live through the circumstances

C. what Steven Callahan thought of in the ban circumstances

D. what was wrong with his boat on the half way

2. From the third paragraph we can infer that ______.

A. the state of mind means one's life or death

B. keeping up one's spirit is especially easy for one

C. most people have good physiological quality

D. bad conditions can strengthen one's will

3. How did Steven Callahan build up his confidence in difficulty?

A. By comparing himself with others.

B. By trying over and over again to call help.

C. By encouraging himself once and again.

D. By trying out different ways of how to survive.

4. What did the writer get from the experience of Steven Callahan?

A .One shouldn't lose heart when in difficulty.

B. Encouragement comes from one's behaviors.

C. The strength of example is endless.

D. To experience the difficulty does good to one person.

Everyday we talk about and use the Internet, but how many of us know the history of the Internet?

Many people are surprised when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer network didn’t work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be good enough to be used by many different computers. If part of the network was not working, information could be sent through another part. In this way computer network system would keep on working on the time.

At first the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed to use it too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software that made “surfing” in the Internet more convenient.

Today it is easy to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular among students.The Internet has now become one of the most important parts of people’s life.

小题1:The Internet has a history of more than _______ years.

A．sixty

B．forty

C．fifty

D．twenty小题2:A new network system was set up to _________.

A．make computers cheaper

B．make itself keep on working all the time

C．break down the whole network

D．make computers large and expensive小题3:__________ made “surfing” the Internet more convenient.

A．Computers

B．Hardware

C．Software

D．Information小题4:Which of the following is TRUE?

A．In the 1960s, computer network worked well.

B．In the early 1970s, the Internet was easy to use.

C．Today it’s still not easy to get on-line.

D．Sending e-mail is now more popular among students than before.

臀大肌与其周围结构的关系最危险的是()

A．浅面的臀内侧皮神经

B．深面穿经梨状肌上孔的血管神经

C．深面穿经梨状肌下孔的血管神经

D．下缘的坐骨神经

E．上缘的臀上神经

非点源(面源)调查基本上采用( )的方法。

A．实测

B．搜集资料

C．委托监测

D．引用历史数据