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TCP／IP层次模型传输层的主要协议有_________和UDP，其中后者提供无连接的不可靠传输服务。

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第二篇 A Desert Between Paul and Clara Paul had long promised to marry Clara．But at thirtythee he met and married Alice．Clara was driven mad． Paul was taken to court．The judge ordered him to pay Clara$600 because of the broken promise．Paul had to borrow the money from a moneylender．He agreed to pay back$5 a month—for twenty years．His wages at the time were$16 a month． Paul and Alice were poor but not unhappy．They had little enough food，certainly，even before the children began to arrive．Each month Paul paid$5 to the moneylender．He worked hard, never taking a holiday．In time，there were seven mouths to feed． Illness was always with them．It grew serious when the oldest child was eight．The years of hunger weakened the family, because each month Paul paid$5．The details of the sickness were ugly, but the result was this：after twelve years of family life，Paul was alone in the world. He lived alone．except for memories．Work was not now a god for him：it was a pain-killer．Each month he paid，and in time the twenty years ended．From that moment his wages were his own． One day, It was a holiday went to the seaside．He sat down on a seat by the sea．A middle．aged woman came and sat down near him．They recognized each other at once. The woman said．“The$600 has been in the bank since the day it was paid to me．It is now $6，000，and I have kept it for you．Will you let me share it with you” “No，”said Paul，gently．“Each thousand is a lost life in a desert between us. It can never bring any happiness．” Paul was ordered to pay Clara$600 because（）

A. he had borrowed $600 from her．
B. he had broken his word to marry her．
C. he had promised to give her$600．
D. he had spent a lot of her money．

Step Back in Time Do you know that we live a lot longer now than the people who were born before us One hundred years ago the average woman 1ived to be 45．But now，she Can live until at least 80． One of the main reasons for people living longer is that we know how to look after ourselves better．We know which foods are good for US and what we have to eat to make sure our bodies get all the healthy things they need．We know why we sometimes get ill and what to do to get better again．And we know how important it is to do lots of exercise to keep our hearts beating healthily． But in order that we don’t slip back into bad habits，let’s have a look at what life was like 100 years ago． Families had between 15 and 20 children，athough many babies didn’t live long．Children suffered from lots of diseases，especially rickets(佝偻病)and scurvy(坏血病)，which are both caused by bad diets．This is because many families were very poor and not able to feed their children well． Really poor families who lived in crowded cities like London and Manchester often slept standing up, bending over a piece of string，because there was no room for them to lie down． People didn’t have fridges until the 1920s．They kept fresh food cold by storing it on windowsills(窗台板)，blocks of ice，or even burying it in the garden． Some children had to start work at the age of seven or eight lo earn money for their parents．If you had lived 100 years ago，you might well be selling matchsticks(火柴杆)(a job done by many children)or working with your dad by now． A hundred years ago many kids died at all early age.（）

A. Right
B. Wrong
C. Not mentioned

简答题简述明律是如何打击贪官污吏的？

ATM网络交换节点采用的主要设备是_________。