肾小管的分泌过程属于（）

某投资者以65 000元／吨卖出1手8月铜期货合约，同时以63 000元／吨买入1手10月铜合约，当8月和10月合约价差为(    )元／吨时，该投资者亏损。

Th₁细胞主要分泌的细胞因子是

（  ）指银行在与消费者形成法律关系时，应当遵循公正、平等、诚实、信用的原则，不得强行要求消费者购买、使用其产品或接受其服务，也不得在合同或法律关系中制定规避义务和违反公平的条款。（2019新）

治疗阴虚火旺之郁证，应首选

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 can we know about viruses and bacteria from the fourth paragraph?

教育科学研究的一般步骤包括选定课题、查阅有关文献、制订研究方案、搜集整理资料、教育研究成果的表述。下列有关说法正确的是（）。

京京今年上大班，老师对他印象一直不好，其实他的学习成绩还不错，也没犯过什么大错，就是平时有点顽皮，不太自觉，上课有时候爱讲话。但老师对他很有偏见，甚至经常故意挑京京的错。老师的做法（  ）。

大剂量用时需大量饮水防止脱水的药物是

钠水潴留容量依赖性高血压患者，治疗应首选的药物是