在Internet中完成从域名到IP地址或者从IP地址到域名转换服务的是（）。

[单选题]Passage1Do who choose to go on exotic，far-flung holidays deserve free health advice before they travel？And even if they pay，who ensures that they get good，up-to-date information？Who，for that matter，should collect that information in the first place？For a variety of reasons，travel medicine in Britain is a responsibility nobody wants.As a result，many travellers go abroad prepared to avoid serious disease.Why is travel medicine so unloved？Partly there's an identity problem. Because it takes an interest in anything that impinges on the health of travelers ，this emerging medical specialism invariably cuts across the traditional disciplines. It delves into everything from seasickness，jet lag and the hazards of camels to malaria and plague. But travel medicine has a more serious obstacle to overcome. Travel clinics are meant to tell people how to avoid ending up dead or in a hospital when they come home，but it is notoriously difficult to get anybody pay out money for keeping people healthy.Travel medicine has also been colonized by commercial interests; the vast majority of travel clinics in Britain are run by airlines or travel companies. And while travel concerns are happy to sell profitable injections, they may be less keen to spread bad news about travellers' diarrhea in Turkey, or to take time to spell out preventive measures travellers could take."The NHS finds it difficult to define travellers' health,"says Ron Behrens,"the only NHS consultant in travel and director of the travel clinic of the Hospital for Tropical Diseases in London."Should it come within the NHS or should it be paid for?"It's Gary area, and opinion is spilt. No one seems to have any responsibility for defining its role,"he says.To compound its low status in the medical hierarchy, travel medicine has to rely on statistics that are patchy at best. In most cases we just don't know how many Britons contract diseases when abroad. And even if a disease linked to travel there is rarely any information about where those afflicted went, what they are, how they behaved, or which vaccinations they had. This shortage of hard facts and figures makes it difficult to give detailed advice to people, information that might even save their lives.A recent leader in British Medical Journal argued."Travel medicine will emerge as credible disciplines only if the risks encountered by travellers and the relative benefits of public health interventions are well defined in terms of their relative occurrence, distribution and control."Exactly how much money is wasted by poor travel advice. The real figure is anybody's guess, but it could easily run into millions. Behrens gives one example. Britain spends more than £ 1 million each year just on cholera vaccines that often don't work and so give people a false sense of security."Information on the prevention and treatment of all forms of diarrhea would be a better priority," he says.The phrase "delves into" in Paragraph 2 can be replaced by_______.

[单选题]在下列地下工程的防水做法中，宜优先考虑（）防水方法。

[单选题]吉布森在用视崖测量婴儿的深度知觉时，他选择的婴儿具有深度知觉的指标是（）

[单选题]宜采用水飞法炮制的药物是（）

[填空题]目前常用的稳定器有（）等几种形式。

[单选题]臀位阴道分娩，产程处理正确的是（）

[单选题]危险场所电气设备允许最高表面温度为（）℃。

[单选题]1g葡萄糖氧化分解大约能产生的能量是（）

[单选题]丈量目测定线时，可使用花杆定位，其顺序应是（）。

[单选题]哪一种虹膜改变最容易发生在Fuchs异色性虹膜睫状体炎（）。

[单选题]在Internet中完成从域名到IP地址或者从IP地址到域名转换服务的是（）。

[单选题]在Internet中，主机的IP地址与域名的关系是（）

[单选题]在Internet中，通过（）将域名转换为IP地址。

[填空题]Internet的域名和IP之间的关系是（）。

[单选题]Internet中域名与IP之间的翻译是由哪个设备来完成的。（）

[单选题]下列有关Internet中主机域名与主机IP地址的说法，不正确的是（）。

[单选题]在Internet中，连网主机的域名与IP地址的对应关系，是用（）进行定义的。

[单选题]在Internet中，连网主机的域名与IP地址的对应关系，是用（）进行定义的。

[判断题]INTERNET上的地址有IP地址、域名地址两种表示形式。

[判断题]INTERNET上的地址有IP地址、域名地址两种表示形式。