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某女，28岁，心悸头晕、胸闷痞满时轻时重2年余。近日出现水肿，小便短少，四肢微凉，舌淡胖，脉沉滑。辨证为（）。
在人与环境界面中，无论环境多么人性化，人的因素都起（）作用。
崩岗是属于以重力为主要外营力的侵蚀形式
紫杉醇具有独特的抗癌作用，其作用靶点是有（）中至关重要的微管蛋白。
在电子商务条件下，卖方的义务只是按照合同的规定提交单据。
土坝的渗透变形有主要形式有（）、（）、（）、（）。
请阅读 Passage 1,完成第 21~25小题 。Passage 1First 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?
单推单溜，双推单溜、双推双溜三个驼峰作业方案各有何优缺点？各在什么样（改编要求）的编组站采用？
鲜活药材接收应（）检查是否新鲜。
普通乳的分散质点的一般大小为（）
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