高分子材料以高分子化合物为基础，其结构决定其性能，对结构的控制和改进，可获得不同特性的高分子材料。高分子材料独特的结构和易改性、易加工特点，使其具有其他材料不可比拟、不可取代的优异性能，从而广泛用于科学技术、国防建设和国民经济各个领域，并已成为现代社会生活中衣、食、住、行、用各个方面不可缺少的材料。下列属于现代高分子材料的是()。

下列选项中，原植物属于芸香科的是（ ）

下列关于阴道功能的叙述，错误的是（   ）

治疗实喘风寒壅肺证，首选的方剂是

患者关节游走性疼痛，活动不便，局部灼热红肿，痛不可触，得冷则舒，伴有发热，恶风，汗出，口渴，舌质红，苔黄腻，脉浮数。治疗应首选的方剂是（     ）

下述哪项不是桡骨小头半脱位的发病因素

患者，男，45岁。咽喉肿痛，咳嗽痰黄，胸闷微喘，痰鸣有声。用药应首选的是(   )

女，59岁。查体发现肝硬化4年。5天前与朋友聚餐时出现呕血，鲜红色，量约1200mL。患者出现头晕、心慌、出冷汗等。经输血、补液和应用止血药物治疗后病情好转，血压和心率恢复正常。2天前出现睡眠障碍，并出现幻听和言语不清，化验检查示：血氨128μg/dL，血糖5.4mmol/L，尿素氮7.2mmol/L。消化道出血的原因最可能是（    ）。

请阅读  Passage 1,完成第  21~25小题 。

Passage 1

First two hours, now three hours-this ishow far in advance authorities are recommending people show up to catch adomestic flight, at least at some major U.S. airports with increasingly massivesecurity lines.

Americans are willing to toleratetime-consuming security procedures in return for increased safety. The crash ofEgyptAir Flight 804, which terrorists may have downed over the Mediterranean Sea,provides another tragic reminder of why. But demanding too much of airtravelers or providing too little security in return undermines public supportfor the process. And it should: Wasted time is a drag on Americans ' economicand private lives, not to mention infuriating.

Last year, the Transportation SecurityAdministration (TSA) found in a secret check that undercover investigators wereable to sneak weapons-both fake and real-past airport security nearly everytime they tried. Enhanced security measures since then, combined with a rise inairline travel due to the improving economy and low oil prices, have resultedin long waits at major airports such as Chicago ' s O ' Hare International. Itis not yet clear how much more effective airline security has become-but thelines are obvious.

Part of the issue is that the governmentdid not anticipate the steep increase in airline travel, so the TSA is nowrushing to get new screeners on the line. Part of the issue is that airportshave only so much room for screening lanes. Another factor may be that morepeople are trying to overpack their carry-on bags to avoid checked-baggagefees, though the airlines strongly dispute this.

There is one step the TSA could take thatwould not require remodeling airports or rushing to hire: Enroll more people inthe PreCheck program. PreCheck is supposed to be a win-win for travelers andthe TSA. Passengers who pass a background check are eligible to use expectedscreening lanes. This allows the TSA to focus. on travelers who are higherrisk, saving time for everyone involved. The TSA wants to enroll 25 millionpeople in PreCheck.

Ithas not gotten anywhere close to that, and one big reason is sticker shock:Passengers must pay $85 every five years to process their background checks.Since the beginning, this price tag has been PreCheck ' s fatal flaw. Upcomingreforms might bring the price to a more reasonable level. But Congress shouldlook into doing so directly, by helping to finance PreCheck enrollment or tocut costs in other ways.

Which of the following contributes to long waits at major airports?

防雷、接地装置的施工程序中，均压环安装的紧后程序是（   ）。

气阴不足，症见体倦气短，口渴多汗，舌燥咽干，脉虚细者，治宜选用（    ）