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设随机变量X，Y相互独立，且X~N（2，1），Y~N（1，1），则（）

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A. the others B. all others C. these D. those

A. the others
B. all others
C. these
D. those

Early cancer screening Can help reduce significantly

A. the death rates for a11 chronic diseases．
B. the kinds of cancer attacking people．
C. the incidence rate for cancer．
D. the death rate for cancer．

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三、表格资料（１１６～１２０题，每题１分，共５分）：每道题针对一表格资料有几个问题，要求根据资料所提供的信息进行分析、比较、计算，从四个备选项中选择符合题意的答案。
根据下表回答１１６～１２０题：
广东、江苏、浙江第三产业不同时期年均增长情况比较单位：％
广东、江苏、浙江第三产业增加值
占ＧＤＰ比重单位：％
１１６．根据上表，下列表述正确的是：
Ａ．１９７９—１９９０年，广东第三产业年均增速比浙江高３．４个百分点
Ｂ．从１９９０年至２００３年，江苏第三产业占ＧＤＰ比重升幅为３６．６个百分点
Ｃ．到２００３年时，广东第三产业占ＧＤＰ比重已被江苏超过１．３个百分点
Ｄ．从１９９０年至２００３年，广东第三产业占ＧＤＰ比重一直居全国首位

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The job of finding these dead bodies was carried out by an unpleasant group of people called“body snatchers'’.They went into graveyards(墓地)at night and，using wooden shovels to make less noise。dug up any recently buried bodies.Then they took the bodies to the medical schools and sold them.A body could be sold for between￡5 and~10，which was a lot of money at that time.The doctors who paid the body snatchers had all agreement with t}them—they never asked any questions.They did not desire to know where the bodies came from，as long as they kept arriving.
The most famous of these body snatchers were two men from Edinburgh called William Burke and William Hare.Burke and Hare were different because they did not just dig Up bodies from graveyards.They got greedy and thought of all easier way to find bodies.Instead of digging them up，they killed the poorer guests in Hare’s small hotel.Dr.Knox，the respected surgeon they worked for, never asked why all the bodies they brought him had been strangled (勒死).For many years Burke and Hare were not caught because，unsurprisingly, the bodies of their victims were never found by the police.They were eventually arrested and put on trial in 1 829.
The judge showed mercy to Hare and he was released but Burke Was found guilty and his punishment was to be hanged.Appropriately, his body Was given to the medical school and he ended up on the dissecting table，just like his victims.In one small way,.justice was done.
Now，over 150 years later, surgeons do not need the help of criminals to learn their skills. However，the science of surgery could not have developed without their rather gruesome(令人毛骨悚然的) help.
第11题：The problem facing British surgeons in the early 19thcenturywas that

A. some illnesses remained incurable．
B. few people were willing to work as surgeons．
C. medical expenses were too high．
D. dead bodies were not easily available．

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