| 考研每日一练（2019/5/17） |
| 第1题：最易导致阴虚阳亢的脏是
A．肺脾肾 B．心脾肾 C．心肝肾 D．肺肝肾 E．肺脾肝 |
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| 第2题：反密码子是指
A．DNA的遗传信息 B．tRNA的某些部分 C．mRNA除密码子以外的其他部分 D．rRNA的某些部分 E．密码子的相应氨基酸 |
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| 第3题：下列哪项不属于胃酸的生理作用
A．激活胃蛋白酶原 B．使食物中蛋白质变性易于分解 C．杀死进入胃内的细菌 D．促进维生素B12的吸收 |
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| 第4题：温家宝在2006年政府工作报告中提出，今年要抓紧解决广大群众最关心、最直接、最现实的利益问题，包括 A、抓紧解决群众买房难的问题 B．要继续实施积极的就业政策，千方百计扩大就业 C．加快推进社会保障体系建设 D．突出抓好医疗卫生工作 |
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| 第5题：Plastic is the panacea of the ages. Nearly every man-made object (1) (2) of, or at least (3) its very structure, to this wonder compounD、Rain slickers, computer terminals, automobile engine parts, coffee cups (and the sugar stirrers too), breast implants, toy soldiers--they are all made up of plastic, or one of its many (4) . Since the (5) of civilization, humankind has been experimenting (6) a multifunctional material--one that had to be equally strong and lightweight--to carry, contain and protect valuables. (7) it could carry, contain and protect humans too, evenBetter. Generations of tinkerers and scientists set off (8) the challenge, striking gold some 170 years ago.By mixing natural rubber with sulphur they created the world’s most utilized material ever. In developing a (9) , malleable and durable substance, the most important inventions of the industrial age were to follow shortly thereafter. The automobile and airplane industries, to (10) just two, owe their very existence to plastiC、And, (11) celluloid plastic strips, the LumiereBrothers would never have brought moving pictures to the big screen. The development of plastic is a story of human (12) , ingenuity and luck. (13) the legend now goes, in 1839, theAmerican inventorCharles Goodyear (the famous tyre company would later use his name) was experimenting with the sulphur treatment of natural rubber when he dropped a piece of sulphur treated rubber on a stove; The heat seemed to give rubber (14) properties. It was stronger, more (15) to abrasion, more elastic, much less (16) to temperature, (17) to gases, and highly resistant to chemicals and electric (18) .Eyeing this as a cheaply and easily reproduced construction material, a whirlwind of work (19) and the birth of (20) plastic and plastic-derivatives were born from camphor to celluloid to rayon; cellophane, polyvinyl chloride (or PVC、; styrofoam and nylon were soon to follow. A．especially B．partially C．partly D．entirely |
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| 第6题： {{B}}Directions:{{/B}} Read the following text.Choose the best word(s) for each numbered blank and markA,B,C, andD、onANSWER SHEET 1. Today,{{U}} (6) {{/U}}, the potential problem is too much carbon dioxide.Could the increase in carbon dioxide{{U}} (7) {{/U}}a global rise in average temperature, and could such a rise have serious{{U}} (8) {{/U}}for human society Mathematical models that allow us to calculate the rise in temperature as a function of the increase{{U}} (9) {{/U}};that the{{U}} (10) {{/U}}is probably yes. One mathematical model{{U}} (11) {{/U}}that doubling the atmospheric carbon dioxide would raise the global mean surface temperature by 2.5℃. This model assumes that the atmosphere’s relative humidity remains constant and the temperature decreases with altitude at a{{U}} (12) {{/U}}of 6.5℃ per kilometer. The assumption of constant relative humidity is important, because water vapor in the atmosphere is another{{U}} (13) {{/U}}absorber or radiation at infrared wavelengths.Because warm air can hold more{{U}} (14) {{/U}}than cool air, the relative humidity will be constant{{U}} (15) {{/U}}the amount of water vapor in the atmosphere increases{{U}} (16) {{/U}}the temperature rises.{{U}} (17) {{/U}}, more infrared radiation would be absorbed and reradiated{{U}} (18) {{/U}}to theEarth’s surface. The resultant warming at the surface could be expected to melt snow and ice,{{U}} (19) {{/U}}theEarth’s reflectivity. More solar radiation would be absorbed,{{U}} (20) {{/U}}to a further increase in temperature. |
| 第7题：马克思主义政党自身建设的根本任务是
A．立党为公、执政为民 B．党的先进性建设 C．保持与时俱进的品质 D．构建社会主义和谐社会 |
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| 第8题：
单项选择 |
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| 第9题： 下列哪项试验不属于实验流行病学研究 A．干预试验 B．社区试验 C．预防性试验 D．临床试验 E．观察性试验 |
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| 第10题：乌药的功效是
A．行气止痛、温肾散寒 B．疏肝理气、调经止痛 C．行气调中止痛 D．理气止痛、祛寒散滞 |
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