缺素症表现为花粉发育不良、“花而不实”的元素可能是（ ）。

患者，男，38岁。患急性子痈2天，恶寒发热，左侧睾丸肿大疼痛，疼痛引及子系（精索），舌红苔黄腻，脉滑数。证属湿热下注，气血壅滞，经络阻隔为患。治宜清热解毒，利湿消肿，应首选（    ）

甲商店购入400件同款夏装。7月以进价的1.6倍出售，共售出200件；8月以进价的1.3倍出售，共售出100件；9月以进价的0.7倍将剩余的100件全部售出，总共获利15000元。则这批夏装的单件进价为多少元:

炉缺水是锅炉运行中最常见的事故之一，尤其当出现严重缺水时，常常会造成严重后果。如果对锅炉缺水处理不当，可能导致锅炉爆炸。当锅炉出现轻微缺水时，正确的处理方法是（        ）。

下列哪项不属于输血并发症(     )

关于无权代理存在的表现形式，下列选项错误的是(　　)。

患者，男，22岁。中午与家人吃麻辣火锅，下午泄泻，刻下症见泄泻腹痛、便黄而黏、肛门灼热。医师诊断为湿热泄泻，给予处方葛根芩连丸。葛根芩连丸中的君药是（ ）

教学工作的中心环节是（　　）。

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.

Broadly speaking, the genes more active in the lonely _______

魏征曾对唐太宗李世民说：“嗜欲喜怒之情，贤愚皆同。贤者能节之，不使过度，愚者纵之，多至失所。”这说的是意志要有（     ）。

下列情形中,属于诉讼时效中止的是(       )。