烧结空心砖砌体的灰缝应为（  ）。

某中学根据学生的学习成绩发不同颜色的校服。年级前60名学生是红色

衣服，其他学生穿蓝色校服，这种做法(　　)。

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 _______

() 是我国古代建筑工程家，被建筑工匠称为 “祖师”。

国家《关于加强农村留守儿童关爱保护工作意见》进一步明确了(   )的关爱机制。

（  ）指银行的债权人或所有者，借助于银行的信息披露和有关社会中介机构，如律师事务所、会计师事务所、审计师事务所和信用评估机构等的帮助，通过自觉提供监督和实施对银行活动的约束，把管理落后或不稳健的银行逐出市场等手段来迫使银行安全稳健经营的过程。

生活贫困、疾病流行、文化落后以及不和谐的家庭环境，是影响学前儿童生长发育的(  )因素。

下列关于《大清民律草案》与《中华民国民法》编纂体例的表述，正确的是（   ）。

免疫监视功能低下时，易发生

功利论是指(   )

胃溃疡多位于（）。