以雌二醇为母体结构的雌激素合成衍生物是

下列关于黄金投资的特点，表述错误的是（  ）。

八脉交会穴中通带脉的是（   ）

在破伤风的治疗措施中，下列选项关键的是

患者，男，50岁。脑外伤后，双眼睑皮下及球结膜下出血，鼻腔流出血性脑脊液，临床诊断最大可能是(    )

患者，女，46岁。因感冒而致发热、流涕，自行服用多种含对乙酰氨基酚的复方抗感冒药后，发生急性肝衰竭。可选用的解救药物是（    ）

男，49岁。车祸后神志不清3小时。查体：昏迷，右侧瞳孔直径5mm，对光反射消失，左侧瞳孔直径3mm，对光反射迟钝。左侧巴宾斯基征(+)，头颅CT：右侧颞骨板下新月形，高密度影，同侧脑室受压，中线结构向左侧移位1cm，急救时首先采取的措施为(    )

下列选项中不属于商业银行市场风险限额管理的是（）。

Passage1

   Lonely people, it seems, are at greater riskthan the gregarious of developing illnesses associated with chronicinflammation, such as heart disease and certain cancers. A paper published lastyear in the Public Library of Science, Medicine, shows the effect on mortalityof loneliness   is comparable with thatof smoking and drinking after examining the results of 148 previous studies andcontrolled for factors such as age and pre-existing illness.

Steven Cole of the University ofCalifornia, Los Angeles, thinks he may know why this is so. He told theAmerican Association for the Advancement of Science meeting in Washington,D.C., about his work studying the expression of genes in lonely people. Dr.Cole harvested samples of white blood cells from both lonely and gregariouspeople. He then analysed the activity of their genes, as measured by theproduction of a substance called messenger RNA. This molecule carries    instructions from the genes telling a cellwhich proteins to make. The level of messenger RNA from most genes was the samein both types of people. There were several dozen genes, however, that wereless active m the lonely, and several dozen others that were more active.Moreover, both the     less active andthe more active gene types came from a small number of functional groups.

   Broadly speaking, the genes less active in thelonely were those involved in staving off viral infections. Those that weremore active were involved in protecting against bacteria. Dr. Cole suspectsthis could help explain not only why the lonely are iller, but how, inevolutionary terms, this odd state of affairs has come about.

    The crucial bit ofthe puzzle is that viruses have to be caught from another infected individual andthey are usually species-specific. Bacteria, in contrast, often just lurk inthe environment, and  may thrive on manyhosts. The gregarious are therefore at greater risk than the lonely ofcatching  viruses, and Dr. Cole thussuggests that past evolution has created a mechanism which causes white cellsto respond appropriately. Conversely, the lonely are better off ramping uptheir protection  against bacterialinfection, which is a bigger relative risk to them.

     What Dr. Cole seemsto have revealed, then, is a mechanism by which social environment reachesinside a person's body and tweaks its genome so that it responds appropriately.It is not that the lonely and the gregarious are genetically different fromeach other. Rather, their genes are regulated differently, according to howsociable an individual is. Dr. Cole thinks this regulation is part of a widermechanism that tunes individuals to the circumstances they find themselves in.

What message does Dr. Cole seem to convey by the mechanism?

事实性知识是对具体事实的描述，概念性知识是在若干事实的基础上归纳、总结出的普遍规律,在人的知识结构中起着支架作用。下列陈述属于概念性知识的是（  ）。

对胸腔积液患者，胸穿抽出有臭味混浊液体，对病因诊断最有价值的诊断是