假定有如下程序代码，程序运行后，把鼠标光标移到窗体内，每单击一次，变换一种鼠标光标的

属于验收依据的是（）。

A．订单

B．送货单

C．领料单

D．装箱单

下述哪种情况，急性胆囊炎不宜行腹腔镜胆囊切除术（）

A.高龄患者伴有糖尿病，发病48小时

B.发病时间>72小时

C.右上腹压痛、肌紧张，莫菲征阳性

D.发病时间<72小时

E.肥胖患者

关于尿病原学的检查，下列不正确的是（）

A.应包括定量培养和涂片检查

B.绝对不能穿刺膀胱收集尿液

C.标本应取自新鲜中段尿

D.一般应同时加做药物敏感试验

E.取尿样时，男性应上翻包皮，女性应清洁外阴，也可经导尿获取尿液

对临床用量大、采购金额高、多家企业生产的基本药物和非专利药品（）

A.公立医院实行国家定点生产的议价采购

B.公立医院实行谈判采购

C.公立医院实行招标采购

D.公立医院实行直接挂网采购

Addiction is such a harmful behavior, in fact, that evolution should have long ago weeded it out of the population: if it’s hard to drive safely under the influence, imagine trying to run from a saber-toothed tiger or catch a squirrel for lunch. And yet, says Dr. Nora Volkow, director of NIDA and a pioneer in the use of imaging to understand addiction, "the use of drugs has been recorded since the beginning of civilization. Humans in my view will always want to experiment with things to make them feel good. "

That’s because drugs of abuse co-opt the very brain functions that allowed our distant ancestors to survive in a hostile world. Our minds are programmed to pay extra attention to what neurologists call salience--that is, special relevance. Threats, for example, are highly salient, which is why we instinctively try to get away from them. But so are food and sex because they help the individual and the species survive. Drugs of abuse capitalize on this ready-made programming. When exposed to drugs, our memory systems, reward circuits, decision-making skills and conditioning kick in--salience in overdrive--to create an all consuming pattern of uncontrollable craving. "Some people have a genetic predisposition to addiction," says Volkow. "But because it involves these basic brain functions, everyone will become an addict if sufficiently exposed to drugs or alcohol. "

That can go for nonchemical addictions as well. Behaviors, from gambling to shopping to sex, may start out as habits but slide into addictions. Sometimes there might be a behavior-specific root of the problem. Volkow’s research group, for example, has shown that pathologically obese people who are compulsive eaters exhibit hyperactivity in the areas of the brain that process food stimuli--including the mouth, lips and tongue. For them, activating these regions is like opening the floodgates to the pleasure center. Almost anything deeply enjoyable can turn into an addiction, though.

Of course, not everyone becomes an addict. That’s because we have other, more analytical regions that can evaluate consequences and override mere pleasure seeking. Brain imaging is showing exactly how that happens. Paulus, for example, looked at drug addicts enrolled in a VA hospital’s intensive four-week rehabilitation program. Those who were more likely to relapse in the first year after completing the program were also less able to complete tasks involving cognitive skills and less able to adjust to new rules quickly. This suggested that those patients might also be less adept at using analytical areas of the brain while performing decision-making tasks. Sure enough, brain scans showed that there were reduced levels of activation in the prefrontal cortex, where rational thought can override impulsive behavior. It’s impossible to say if the drugs might have damaged these abilities in the relapsers--an effect rather than a cause of the chemical abuse--but the fact that the cognitive deficit existed in only some of the drug users suggests that there was something innate that was unique to them. To his surprise, Paulus found that 80% to 90% of the time, he could accurately predict who would relapse within a year simply by examining the scans.

Another area of focus for researchers involves the brain’s reward system, powered largely by the neurotransmitter dopamine. Investigators are looking specifically at the family of dopamine receptors that populate nerve cells and bind to the compound. The hope is that if you can reduce the effect Of the brain chemical that carries the pleasurable signal, you can loosen the drug’s hold.

Paulus could accurately predict the relapsers because（）

A. the part of their brain controlling cognitive skills is less active

B. a four-week intensive rehabilitation program is not effective enough

C. he has the devices sophisticated enough to scan any brain damage

D. something innate to their brains prompt them to use drugs